Compiler warning fix

lib/url.c

@@ -575,7 +575,7 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
      * Verbose means infof() calls that give a lot of information about
      * the connection and transfer procedures as well as internal choices.
      */
-    data->set.verbose = = (bool)(0 != va_arg(param, long));
+    data->set.verbose = (bool)(0 != va_arg(param, long));
     break;
   case CURLOPT_HEADER:
     /*