Index: common/Message.h
===================================================================
--- common/Message.h	(revision b07eeac0258a8440bdd8dfc2331130f1c005ba4b)
+++ common/Message.h	(revision 626e5b0ea869dbbf0f54f58357c47696f9882bc5)
@@ -10,4 +10,5 @@
 #define MSG_TYPE_OBJECT        7
 #define MSG_TYPE_REMOVE_OBJECT 8
+#define MSG_TYPE_DROP_FLAG     9
 
 typedef struct