[8274] use virtual m_TeamScore for battlegrounds

score is used in every battleground (not arena)
so we can use it as a virtual variable to access
it also from BattleGround-class

Signed-off-by: balrok <der-coole-carl@gmx.net>

src/game/BattleGround.cpp

@@ -178,6 +178,9 @@ BattleGround::BattleGround()
     m_PlayersCount[BG_TEAM_ALLIANCE]    = 0;
     m_PlayersCount[BG_TEAM_HORDE]       = 0;
 
+    m_TeamScores[BG_TEAM_ALLIANCE]      = 0;
+    m_TeamScores[BG_TEAM_HORDE]         = 0;
+
     m_PrematureCountDown = false;
     m_PrematureCountDown = 0;