Abort comma simplification when ", %num%" is detected.

This increases speed a lot in some rare situations.

src/tokenize.cpp

@@ -4031,7 +4031,8 @@ void Tokenizer::simplifyComma()
             }
         }
 
-        if (tok->str() != ",")
+        // If token after the comma is a constant number, simplification is not required.
+        if (tok->str() != "," || Token::Match(tok->next(), "%num%"))
             continue;
 
         // We must not accept just any keyword, e.g. accepting int