Fixed possible crash caused by invalid formed CMSG_AUTH_SESSION Author: arrai

--HG--
branch : trunk

src/game/WorldSession.cpp

@@ -619,6 +619,8 @@ void WorldSession::ReadMovementInfo(WorldPacket &data, MovementInfo *mi)
 
 void WorldSession::ReadAddonsInfo(WorldPacket &data)
 {
+    if (data.rpos() + 4 > data.size())
+        return;
     uint32 size;
     data >> size;