fix frozen actors not visible under fog

OpenRA.Game/Traits/Player/FrozenActorLayer.cs

@@ -54,13 +54,15 @@ namespace OpenRA.Traits
 		int flashTicks;
 		public void Tick(World world, Shroud shroud)
 		{
-			Visible = false;
+			Visible = true;
 			foreach (var pos in Footprint)
+			{
 				if (shroud.IsVisible(pos))
 				{
-					Visible = true;
+					Visible = false;
 					break;
 				}
+			}
 
 			if (flashTicks > 0)
 				flashTicks--;

OpenRA.Mods.RA/Modifiers/FrozenUnderFog.cs

@@ -65,11 +65,13 @@ namespace OpenRA.Mods.RA
 			{
 				var isVisible = false;
 				foreach (var pos in footprint)
+				{
 					if (p.Shroud.IsVisible(pos))
 					{
 						isVisible = true;
 						break;
 					}
+				}
 				visible[p] = isVisible;
 				if (isVisible)
 					VisibilityHash += p.ClientIndex;