fix

Author: danmar

lib/errorlogger.cpp

@@ -261,6 +261,8 @@ void ErrorMessage::calculateWarningHash(const std::list<const Token*>& callstack
     for (const Token* tok: callstack) {
         if (!tok)
             continue;
+        if (!tok->scope())
+            return; // might be a syntax error before scope info has been set
         if (tok->scope()->isExecutable()) {
             // Executable scope => include all tokens in the function => if the
             // function is changed the hash is changed