Fix coredumps when learning message with one empty part.

diff --git a/src/fuzzy.c b/src/fuzzy.c
index 55ed6b9ffe5c911db05ebcbaa668e0ae5977bc99..dba76fe69d4217473865e0df21d87be67d7aae29 100644 (file)
--- a/src/fuzzy.c
+++ b/src/fuzzy.c
@@ -478,14 +478,16 @@ fuzzy_compare_hashes (fuzzy_hash_t * h1, fuzzy_hash_t * h2)
 gint
 fuzzy_compare_parts (struct mime_text_part *p1, struct mime_text_part *p2)
 {
-       if (p1->fuzzy->block_size == p2->fuzzy->block_size) {
-               return fuzzy_compare_hashes (p1->fuzzy, p2->fuzzy);
-       }
-       else if (p1->double_fuzzy->block_size == p2->fuzzy->block_size) {
-               return fuzzy_compare_hashes (p1->double_fuzzy, p2->fuzzy);
-       }
-       else if (p2->double_fuzzy->block_size == p1->fuzzy->block_size) {
-               return fuzzy_compare_hashes (p2->double_fuzzy, p1->fuzzy);
+       if (p1->fuzzy != NULL && p2->fuzzy != NULL) {
+               if (p1->fuzzy->block_size == p2->fuzzy->block_size) {
+                       return fuzzy_compare_hashes (p1->fuzzy, p2->fuzzy);
+               }
+               else if (p1->double_fuzzy->block_size == p2->fuzzy->block_size) {
+                       return fuzzy_compare_hashes (p1->double_fuzzy, p2->fuzzy);
+               }
+               else if (p2->double_fuzzy->block_size == p1->fuzzy->block_size) {
+                       return fuzzy_compare_hashes (p2->double_fuzzy, p1->fuzzy);
+               }
        }
 
        return 0;