daemon: Fix regression caused by #3217

Empty <Plugin> section can be used to autoload plugin,
which does not supports configuration callback.

diff --git a/src/daemon/configfile.c b/src/daemon/configfile.c
index 3a7364e..61fa901 100644 (file)
--- a/src/daemon/configfile.c
+++ b/src/daemon/configfile.c
@@ -404,6 +404,10 @@ static int dispatch_block_plugin(oconfig_item_t *ci) {
     }
   }
 
+  /* Try to be backward-compatible with previous versions */
+  if (ci->children_num == 0)
+    return 0;
+
   /* Hm, no complex plugin found. Dispatch the values one by one */
   cf_callback_t *cf_cb = cf_search(plugin_name);
   if (cf_cb == NULL) {