Add missing headers to Group.h and LFGHandler.cpp

Fixes issue #2288

--HG--
branch : trunk

src/game/Group.h

@@ -26,6 +26,7 @@
 #include "BattleGround.h"
 #include "LootMgr.h"
 #include "DBCEnums.h"
+#include "Unit.h"
 
 #include <map>
 #include <vector>

src/game/LFGHandler.cpp

@@ -20,6 +20,7 @@
 #include "LFGMgr.h"
 #include "WorldSession.h"
 #include "WorldPacket.h"
+#include "Player.h"
 
 void WorldSession::HandleSetLfgCommentOpcode(WorldPacket & recv_data)
 {