Don't attempt to proceed if our internal parser indicates an invalid file.

(closes issue #17560)
 Reported by: Nick_Lewis


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@273142 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/config.c

@@ -1902,7 +1902,9 @@ int read_config_maps(void)
 	configtmp = ast_config_new();
 	configtmp->max_include_level = 1;
 	config = ast_config_internal_load(extconfig_conf, configtmp, flags, "", "extconfig");
-	if (!config) {
+	if (config == CONFIG_STATUS_FILEINVALID) {
+		return -1;
+	} else if (!config) {
 		ast_config_destroy(configtmp);
 		return 0;
 	}