Core: Clean up here and there.

*replase postfix iterator increment\decrement with prefix in cycles
*replase strlen(*char) != 0 with *char[0] != '\0'
*replase strlen(rStr.c_str()) with rStr.length()

src/server/game/Battlegrounds/Zones/BattlegroundSA.cpp

@@ -261,7 +261,7 @@ void BattlegroundSA::StartShips()
 
     for (int i = BG_SA_BOAT_ONE; i <= BG_SA_BOAT_TWO; i++)
     {
-        for (BattlegroundPlayerMap::const_iterator itr = GetPlayers().begin(); itr != GetPlayers().end();itr++)
+        for (BattlegroundPlayerMap::const_iterator itr = GetPlayers().begin(); itr != GetPlayers().end(); ++itr)
         {
             if (Player* p = ObjectAccessor::FindPlayer(itr->first))
             {