refactoring - added a function getErrorMessages that will be used to get a list of error messages

src/check.h

@@ -60,6 +60,9 @@ public:
     /** run checks, the token list is simplified */
     virtual void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger) = 0;
 
+    /** get error messages */
+    virtual void getErrorMessages()
+    { }
 
 protected:
     const Tokenizer * const _tokenizer;

src/checkstl.h

@@ -83,6 +83,10 @@ private:
 
     void iteratorsError(const Token *tok, const std::string &container1, const std::string &container2);
 
+    void getErrorMessages()
+    {
+        iteratorsError(0, "container1", "container2");
+    }
 };
 
 //---------------------------------------------------------------------------