allow the cloak palette to stay empty and use it for mines

OpenRA.Mods.RA/Cloak.cs

@@ -74,7 +74,10 @@ namespace OpenRA.Mods.RA
 				return r;
 
 			if (Cloaked && IsVisible(self.World.RenderedShroud, self))
-				return r.Select(a => a.WithPalette(wr.Palette(info.Palette)));
+				if (string.IsNullOrEmpty(info.Palette))
+					return r;
+				else
+					return r.Select(a => a.WithPalette(wr.Palette(info.Palette)));
 			else
 				return Nothing;
 		}

mods/ra/rules/system.yaml

@@ -640,6 +640,7 @@ MINP:
 	Cloak:
 		CloakSound:
 		UncloakSound:
+		Palette:
 	Tooltip:
 		Name: Anti-Personnel Mine
 		Icon: jmin
@@ -659,6 +660,7 @@ MINV:
 	Cloak:
 		CloakSound:
 		UncloakSound:
+		Palette:
 	Tooltip:
 		Name: Anti-Tank Mine
 		Icon: jmin
@@ -732,7 +734,7 @@ CAMERA:
 	Health:
 		HP:1000
 	RevealsShroud:
-		Range: 10	
+		Range: 10
 	ProximityCaptor:
 		Types:Camera