Avoid or reduce LINQ allocations required in various areas.

OpenRA.Game/Map/Map.cs

@@ -1282,16 +1282,12 @@ namespace OpenRA
 				throw new ArgumentOutOfRangeException("maxRange",
 					"The requested range ({0}) cannot exceed the value of MaximumTileSearchRange ({1})".F(maxRange, Grid.MaximumTileSearchRange));
 
-			Func<CPos, bool> valid = Contains;
-			if (allowOutsideBounds)
-				valid = Tiles.Contains;
-
 			for (var i = minRange; i <= maxRange; i++)
 			{
 				foreach (var offset in Grid.TilesByDistance[i])
 				{
 					var t = offset + center;
-					if (valid(t))
+					if (allowOutsideBounds ? Tiles.Contains(t) : Contains(t))
 						yield return t;
 				}
 			}