Fix a logic mistake in parser_get_opt_param_string() that was hidden by the...

Fix a logic mistake in parser_get_opt_param_string() that was hidden by the spurious space added to the default values of strings.

src/parser.c

@@ -750,7 +750,7 @@ void parser_get_opt_param_string(struct swift_params *params, const char *name,
       strcpy(retParam, params->data[i].value);
 
       /* Ensure same behavior if called multiple times for same parameter */
-      if (params->data[i].is_default && !strcmp(def, retParam))
+      if (params->data[i].is_default && strcmp(def, retParam) != 0)
         error(
             "Tried parsing %s again but cannot parse a parameter with "
             "two different default value ('%s' != '%s')",