Core/Grid:

- Simplified CellArea calculation (Original author: SilverIce)

- Removed unused code in Cell class (Original author: SilverIce)

- Improve some Visit functions.

src/server/game/AI/ScriptedAI/ScriptedCreature.cpp

@@ -365,14 +365,13 @@ Player* ScriptedAI::GetPlayerAtMinimumRange(float minimumRange)
 
     CellCoord pair(Trinity::ComputeCellCoord(me->GetPositionX(), me->GetPositionY()));
     Cell cell(pair);
-    cell.data.Part.reserved = ALL_DISTRICT;
     cell.SetNoCreate();
 
     Trinity::PlayerAtMinimumRangeAway check(me, minimumRange);
     Trinity::PlayerSearcher<Trinity::PlayerAtMinimumRangeAway> searcher(me, player, check);
     TypeContainerVisitor<Trinity::PlayerSearcher<Trinity::PlayerAtMinimumRangeAway>, GridTypeMapContainer> visitor(searcher);
 
-    cell.Visit(pair, visitor, *(me->GetMap()));
+    cell.Visit(pair, visitor, *me->GetMap(), *me, minimumRange);
 
     return player;
 }