Check for proper movementflags in player move packet, and kick in case of wrong flags.

--HG--
branch : trunk

src/game/MovementHandler.cpp

@@ -192,6 +192,13 @@ void WorldSession::HandleMovementOpcodes( WorldPacket & recv_data )
     recv_data >> movementInfo.z;
     recv_data >> movementInfo.o;
 
+    if(MovementFlags & MOVEMENTFLAG_FLYING && !(MovementFlags & MOVEMENTFLAG_UNK3))
+    {
+      sLog.outError("Player %s (GUID %u) has incorrect movementflags, kicking.", _player->GetName(), _player->GetGUIDLow());
+      KickPlayer();
+      return;
+    }
+    
     if(MovementFlags & MOVEMENTFLAG_ONTRANSPORT)
     {
         // recheck