Core/Groups: Use the proper RemoveMethod when player leaves a group

--HG--
branch : trunk

src/server/game/Entities/Player/Player.h

@@ -1711,7 +1711,7 @@ class Player : public Unit, public GridObject<Player>
         bool IsInSameRaidWith(Player const* p) const { return p == this || (GetGroup() != NULL && GetGroup() == p->GetGroup()); }
         void UninviteFromGroup();
         static void RemoveFromGroup(Group* group, uint64 guid, RemoveMethod method = GROUP_REMOVEMETHOD_DEFAULT);
-        void RemoveFromGroup() { RemoveFromGroup(GetGroup(),GetGUID()); }
+        void RemoveFromGroup(RemoveMethod method = GROUP_REMOVEMETHOD_DEFAULT) { RemoveFromGroup(GetGroup(),GetGUID(), method); }
         void SendUpdateToOutOfRangeGroupMembers();
 
         void SetInGuild(uint32 GuildId) { SetUInt32Value(PLAYER_GUILDID, GuildId); }

src/server/game/Server/Protocol/Handlers/GroupHandler.cpp

@@ -387,7 +387,7 @@ void WorldSession::HandleGroupDisbandOpcode(WorldPacket & /*recv_data*/)
     // everything's fine, do it
     SendPartyResult(PARTY_OP_LEAVE, GetPlayer()->GetName(), ERR_PARTY_RESULT_OK);
 
-    GetPlayer()->RemoveFromGroup();
+    GetPlayer()->RemoveFromGroup(GROUP_REMOVEMETHOD_LEAVE);
 }
 
 void WorldSession::HandleLootMethodOpcode(WorldPacket & recv_data)