Add to classInfo

lib/checkstl.h

@@ -295,7 +295,8 @@ private:
                "- useless calls of string and STL functions\n"
                "- dereferencing an invalid iterator\n"
                "- reading from empty STL container\n"
-               "- consider using an STL algorithm instead of raw loop\n";
+               "- consider using an STL algorithm instead of raw loop\n"
+               "- incorrect locking with mutex\n";
     }
 };
 /// @}