ha_blackhole.cc:

  Added missing DBUG enter, compiled and tested on production with debug-max
  build (my regular build missed the previous errors friday)

Changeset:
 Added missing DBUG_ENTER, compiled and tested on production with debug-max
 build!

sql/ha_blackhole.cc

@@ -133,6 +133,7 @@ THR_LOCK_DATA **ha_blackhole::store_lock(THD *thd,
                                          THR_LOCK_DATA **to,
                                          enum thr_lock_type lock_type)
 {
+  DBUG_ENTER("ha_blackhole::store_lock");
   DBUG_RETURN(to);
 }