write_log plugin: mark unused attribute as unused

diff --git a/src/write_log.c b/src/write_log.c
index 7260615..b0dc6f1 100644 (file)
--- a/src/write_log.c
+++ b/src/write_log.c
@@ -59,7 +59,7 @@ static int wl_write_messages (const data_set_t *ds, const value_list_t *vl)
 } /* int wl_write_messages */
 
 static int wl_write (const data_set_t *ds, const value_list_t *vl,
-        user_data_t *user_data)
+        __attribute__ ((unused)) user_data_t *user_data)
 {
     int status;