improve error checking for null path

src/switch_config.c

@@ -39,6 +39,10 @@ SWITCH_DECLARE(int) switch_config_open_file(switch_config_t *cfg, char *file_pat
 	char *path = NULL;
 	char path_buf[1024];
 
+	if (!file_path) {
+		return 0;
+	}
+
 	if (switch_is_file_path(file_path)) {
 		path = file_path;
 	} else {
@@ -69,7 +73,7 @@ SWITCH_DECLARE(int) switch_config_open_file(switch_config_t *cfg, char *file_pat
 			switch_set_string(cfg->path, path);
 
 			while (switch_config_next_pair(cfg, &var, &val)) {
-				if (file_path && (cfg->sectno != last) && !strcmp(cfg->section, file_path)) {
+				if ((cfg->sectno != last) && !strcmp(cfg->section, file_path)) {
 					cfg->lockto = cfg->sectno;
 					return 1;
 				}