write_http plugin: Don't register a flush callback unconditionally.

Fixes: #1955

diff --git a/src/write_http.c b/src/write_http.c
index 41615d3..4a5818c 100644 (file)
--- a/src/write_http.c
+++ b/src/write_http.c
@@ -817,13 +817,10 @@ static int wh_config_node (oconfig_item_t *ci) /* {{{ */
                         callback_name, cb->location);
 
         user_data_t user_data = {
-                .data = cb
+                .data = cb,
+                .free_func = wh_callback_free,
         };
 
-        plugin_register_flush (callback_name, wh_flush, &user_data);
-
-        user_data.free_func = wh_callback_free;
-
         if (cb->send_metrics)
         {
                 plugin_register_write (callback_name, wh_write, &user_data);