Remove PPos overload of FindUnits.

OpenRA.Game/Graphics/WorldRenderer.cs

@@ -74,8 +74,8 @@ namespace OpenRA.Graphics
 			var comparer = new RenderableComparer(this);
 
 			var actors = world.FindUnits(
-				bounds.TopLeftAsCPos().ToPPos(),
-				bounds.BottomRightAsCPos().ToPPos());
+				bounds.TopLeftAsCPos(),
+				bounds.BottomRightAsCPos());
 
 			var worldRenderables = actors.SelectMany(a => a.Render(this))
 				.OrderBy(r => r, comparer);

OpenRA.Game/Widgets/WorldInteractionControllerWidget.cs

@@ -185,7 +185,7 @@ namespace OpenRA.Widgets
 		static readonly Actor[] NoActors = {};
 		IEnumerable<Actor> SelectActorsInBox(World world, PPos a, PPos b, Func<Actor, bool> cond)
 		{
-			return world.FindUnits(a, b)
+			return world.FindUnits(a.ToWPos(0), b.ToWPos(0))
 				.Where(x => x.HasTrait<Selectable>() && x.Trait<Selectable>().Info.Selectable && !world.FogObscures(x) && cond(x))
 				.GroupBy(x => x.GetSelectionPriority())
 				.OrderByDescending(g => g.Key)

OpenRA.Game/WorldUtils.cs

@@ -23,7 +23,7 @@ namespace OpenRA
 	{
 		public static IEnumerable<Actor> FindUnitsAtMouse(this World world, int2 mouseLocation)
 		{
-			var loc = Game.viewport.ViewToWorldPx(mouseLocation);
+			var loc = Game.viewport.ViewToWorldPx(mouseLocation).ToWPos(0);
 			return FindUnits(world, loc, loc).Where(a => !world.FogObscures(a));
 		}
 
@@ -34,11 +34,8 @@ namespace OpenRA
 
 		public static IEnumerable<Actor> FindUnits(this World world, WPos tl, WPos br)
 		{
-			return world.FindUnits(PPos.FromWPos(tl), PPos.FromWPos(br));
-		}
-
-		public static IEnumerable<Actor> FindUnits(this World world, PPos a, PPos b)
-		{
+			var a = PPos.FromWPos(tl);
+			var b = PPos.FromWPos(br);
 			var u = PPos.Min(a, b);
 			var v = PPos.Max(a, b);
 			return world.WorldActor.Trait<SpatialBins>().ActorsInBox(u,v);