Wintergrasp fix: Defender team should have 'Essence of Wintergrasp' buff. Patch by manuel, thanks to Spp

--HG--
branch : trunk

src/game/Wintergrasp.cpp

@@ -755,6 +755,11 @@ bool OPvPWintergrasp::UpdateGameObjectInfo(GameObject *go) const
 
 void OPvPWintergrasp::HandlePlayerEnterZone(Player * plr, uint32 zone)
 {
+    if(plr->GetTeam() == getDefenderTeam() && !isWarTime())
+    {
+        plr->CastSpell(plr,SPELL_ESSENCE_OF_WG,true);
+    }
+
     if (isWarTime() && !plr->HasAura(SPELL_RECRUIT) && !plr->HasAura(SPELL_CORPORAL)
         && !plr->HasAura(SPELL_LIEUTENANT))
         plr->CastSpell(plr, SPELL_RECRUIT, true);
@@ -789,6 +794,7 @@ void OPvPWintergrasp::HandlePlayerLeaveZone(Player * plr, uint32 zone)
     REMOVE_TENACITY_AURA(plr);
     OutdoorPvP::HandlePlayerLeaveZone(plr, zone);
     UpdateTenacityStack();
+    plr->RemoveAura(SPELL_ESSENCE_OF_WG);
 }
 
 void OPvPWintergrasp::PromotePlayer(Player *killer) const
@@ -1167,7 +1173,6 @@ void OPvPWintergrasp::EndBattle()
                     (*itr)->AreaExploredOrEventHappens(A_VICTORY_IN_WG);
                     (*itr)->AreaExploredOrEventHappens(H_VICTORY_IN_WG);
                 }
-
             }
             REMOVE_WARTIME_AURAS(*itr);
             REMOVE_TENACITY_AURA(*itr);
@@ -1177,6 +1182,7 @@ void OPvPWintergrasp::EndBattle()
 
     //3.2.0: TeamCastSpell(getAttackerTeam(), SPELL_TELEPORT_DALARAN);
     RemoveOfflinePlayerWGAuras();
+    TeamCastSpell(getDefenderTeam(),SPELL_ESSENCE_OF_WG);
 }
 
 void OPvPWintergrasp::SetData(uint32 id, uint32 value)

src/game/Wintergrasp.h

@@ -49,10 +49,12 @@ enum WintergraspSpell
     SPELL_DESTROYED_TOWER   = 59136,
     SPELL_DAMAGED_BUILDING  = 59201,
     SPELL_INTACT_BUILDING   = 59203,
+
+    SPELL_ESSENCE_OF_WG     = 58045,
+
 // Unused: Not implemented
 //    SPELL_VICTORY_AURA      = 60044,
 //    SPELL_RULERS_OF_WG      = 52108,
-//    SPELL_ESSENCE_OF_WG     = 58045,
 };
 
 enum WintergraspRewardEvent