solve compile warning

diff --git a/src/siri/db/listener.c b/src/siri/db/listener.c
index efa3787ff77aef7e044f73a68f29b14217921243..6d5d565cad27fa8ae109ff90a3b291351b857b51 100644 (file)
--- a/src/siri/db/listener.c
+++ b/src/siri/db/listener.c
@@ -901,7 +901,7 @@ static void enter_group_tag_match(uv_async_t * handle)
 
             uv_mutex_unlock(&siridb->groups->mutex);
         }
-        else /* tag */
+        else if (tag)  /* check to prevent compile warning */
         {
             vec_t * tag_series;