[Minor] Fix corner cases in non-ascii characters counter

diff --git a/src/lua/lua_util.c b/src/lua/lua_util.c
index 669ac5bd90bf3a715f02fe7a28f89ea8ea2c01b0..5bd59a32dcf6132d6693c01c610efadb77188eb5 100644 (file)
--- a/src/lua/lua_util.c
+++ b/src/lua/lua_util.c
@@ -1904,6 +1904,10 @@ lua_util_count_non_ascii (lua_State *L)
                                ret ++;
                                total ++;
 
+                               if (np == NULL) {
+                                       break;
+                               }
+
                                p = (np != p) ? np : p + 1;
 
                                continue;