csync_vio: Better log for stat errors

csync/src/vio/csync_vio.c

@@ -115,7 +115,7 @@ int csync_vio_stat(CSYNC *ctx, const char *uri, csync_vio_file_stat_t *buf) {
     case LOCAL_REPLICA:
       rc = csync_vio_local_stat(uri, buf);
       if (rc < 0) {
-        CSYNC_LOG(CSYNC_LOG_PRIORITY_ERROR, "Local stat failed, errno %d", errno);
+        CSYNC_LOG(CSYNC_LOG_PRIORITY_ERROR, "Local stat failed, errno %d for %s", errno, uri);
       }
       break;
     default: