Add workaround for clang under linux.

Fix problems found by static analyzing.

7 files changed, 16 insertions, 16 deletions

diff --git a/src/lua/lua_cdb.c b/src/lua/lua_cdb.c
index 24f6b205f..fbbc69359 100644
--- a/src/lua/lua_cdb.c
+++ b/src/lua/lua_cdb.c
@@ -49,7 +49,7 @@ lua_check_cdb (lua_State * L)
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{cdb}");
 
 	luaL_argcheck (L, ud != NULL, 1, "'cdb' expected");
-	return *((struct cdb **)ud);
+	return ud ? *((struct cdb **)ud) : NULL;
 }
 
 static gint
diff --git a/src/lua/lua_classifier.c b/src/lua/lua_classifier.c
index 4e868b7f7..82fd4948d 100644
--- a/src/lua/lua_classifier.c
+++ b/src/lua/lua_classifier.c
@@ -72,7 +72,7 @@ lua_check_classifier (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{classifier}");
 	luaL_argcheck (L, ud != NULL, 1, "'classifier' expected");
-	return *((struct classifier_config **)ud);
+	return ud ? *((struct classifier_config **)ud) : NULL;
 }
 
 static GList *
@@ -353,7 +353,7 @@ lua_check_statfile (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{statfile}");
 	luaL_argcheck (L, ud != NULL, 1, "'statfile' expected");
-	return *((struct statfile **)ud);
+	return ud ? *((struct statfile **)ud) : NULL;
 }
 
 
diff --git a/src/lua/lua_config.c b/src/lua/lua_config.c
index b4db951ff..d67176f0f 100644
--- a/src/lua/lua_config.c
+++ b/src/lua/lua_config.c
@@ -109,7 +109,7 @@ lua_check_config (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{config}");
 	luaL_argcheck (L, ud != NULL, 1, "'config' expected");
-	return *((struct config_file **)ud);
+	return ud ? *((struct config_file **)ud) : NULL;
 }
 
 static radix_tree_t           *
@@ -117,7 +117,7 @@ lua_check_radix (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{radix}");
 	luaL_argcheck (L, ud != NULL, 1, "'radix' expected");
-	return **((radix_tree_t ***)ud);
+	return ud ? **((radix_tree_t ***)ud) : NULL;
 }
 
 static GHashTable           *
@@ -125,7 +125,7 @@ lua_check_hash_table (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{hash_table}");
 	luaL_argcheck (L, ud != NULL, 1, "'hash_table' expected");
-	return **((GHashTable ***)ud);
+	return ud ? **((GHashTable ***)ud) : NULL;
 }
 
 static rspamd_trie_t          *
@@ -134,7 +134,7 @@ lua_check_trie (lua_State * L)
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{trie}");
 
 	luaL_argcheck (L, ud != NULL, 1, "'trie' expected");
-	return *((rspamd_trie_t **)ud);
+	return ud ? *((rspamd_trie_t **)ud) : NULL;
 }
 
 /*** Config functions ***/
@@ -764,7 +764,7 @@ lua_trie_search_task (lua_State *L)
 	if (trie) {
 		ud = luaL_checkudata (L, 2, "rspamd{task}");
 		luaL_argcheck (L, ud != NULL, 1, "'task' expected");
-		task = *((struct worker_task **)ud);
+		task = ud ? *((struct worker_task **)ud) : NULL;
 		if (task) {
 			lua_newtable (L);
 			cur = task->text_parts;
diff --git a/src/lua/lua_http.c b/src/lua/lua_http.c
index 1ecfdfd12..99976c238 100644
--- a/src/lua/lua_http.c
+++ b/src/lua/lua_http.c
@@ -63,7 +63,7 @@ lua_check_task (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{task}");
 	luaL_argcheck (L, ud != NULL, 1, "'task' expected");
-	return *((struct worker_task **)ud);
+	return ud ? *((struct worker_task **)ud) : NULL;
 }
 
 static void
diff --git a/src/lua/lua_message.c b/src/lua/lua_message.c
index 70e33981b..1026c3690 100644
--- a/src/lua/lua_message.c
+++ b/src/lua/lua_message.c
@@ -94,7 +94,7 @@ lua_check_message (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{message}");
 	luaL_argcheck (L, ud != NULL, 1, "'message' expected");
-	return *((GMimeMessage **) ud);
+	return ud ? *((GMimeMessage **) ud) : NULL;
 }
 
 
diff --git a/src/lua/lua_regexp.c b/src/lua/lua_regexp.c
index ee8579dec..7a0b3d0c3 100644
--- a/src/lua/lua_regexp.c
+++ b/src/lua/lua_regexp.c
@@ -53,7 +53,7 @@ lua_check_regexp (lua_State * L)
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{regexp}");
 
 	luaL_argcheck (L, ud != NULL, 1, "'regexp' expected");
-	return *((GRegex **)ud);
+	return ud ? *((GRegex **)ud) : NULL;
 }
 
 static int
diff --git a/src/lua/lua_task.c b/src/lua/lua_task.c
index a6530160f..f3fdc3bad 100644
--- a/src/lua/lua_task.c
+++ b/src/lua/lua_task.c
@@ -166,7 +166,7 @@ lua_check_task (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{task}");
 	luaL_argcheck (L, ud != NULL, 1, "'task' expected");
-	return *((struct worker_task **)ud);
+	return ud ? *((struct worker_task **)ud) : NULL;
 }
 
 static struct mime_text_part   *
@@ -174,7 +174,7 @@ lua_check_textpart (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{textpart}");
 	luaL_argcheck (L, ud != NULL, 1, "'textpart' expected");
-	return *((struct mime_text_part **)ud);
+	return ud ? *((struct mime_text_part **)ud) : NULL;
 }
 
 static struct rspamd_image      *
@@ -182,7 +182,7 @@ lua_check_image (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{image}");
 	luaL_argcheck (L, ud != NULL, 1, "'image' expected");
-	return *((struct rspamd_image **)ud);
+	return ud ? *((struct rspamd_image **)ud) : NULL;
 }
 
 static struct uri      *
@@ -190,7 +190,7 @@ lua_check_url (lua_State * L)
 {
 	void                           *ud = luaL_checkudata (L, 1, "rspamd{url}");
 	luaL_argcheck (L, ud != NULL, 1, "'url' expected");
-	return *((struct uri **)ud);
+	return ud ? *((struct uri **)ud) : NULL;
 }
 
 /*** Task interface	***/
@@ -1355,7 +1355,7 @@ lua_textpart_compare_distance (lua_State * L)
 	const GMimeContentType         *ct;
 
 	luaL_argcheck (L, ud != NULL, 2, "'textpart' expected");
-	other = *((struct mime_text_part **)ud);
+	other = ud ? *((struct mime_text_part **)ud) : NULL;
 
 	if (part->parent && part->parent == other->parent) {
 		parent = part->parent;