Core: Remove Player.h dependency from all the possible headers

src/server/game/Battlegrounds/BattlegroundQueue.cpp

@@ -24,6 +24,7 @@
 #include "ArenaTeamMgr.h"
 #include "Log.h"
 #include "Group.h"
+#include "Player.h"
 
 /*********************************************************/
 /***            BATTLEGROUND QUEUE SYSTEM              ***/
@@ -216,7 +217,7 @@ GroupQueueInfo* BattlegroundQueue::AddGroup(Player* leader, Group* grp, Battlegr
                 // Show queue status to player only (when joining queue)
                 if (sWorld->getBoolConfig(CONFIG_BATTLEGROUND_QUEUE_ANNOUNCER_PLAYERONLY))
                 {
-                    ChatHandler(leader).PSendSysMessage(LANG_BG_QUEUE_ANNOUNCE_SELF, bgName, q_min_level, q_max_level,
+                    ChatHandler(leader->GetSession()).PSendSysMessage(LANG_BG_QUEUE_ANNOUNCE_SELF, bgName, q_min_level, q_max_level,
                         qAlliance, (MinPlayers > qAlliance) ? MinPlayers - qAlliance : (uint32)0, qHorde, (MinPlayers > qHorde) ? MinPlayers - qHorde : (uint32)0);
                 }
                 // System message