removed needless cursor indirection

OpenRa.Mods.RA/SpyPlanePower.cs

@@ -60,7 +60,7 @@ namespace OpenRa.Mods.RA
 			public void Tick(World world) {}
 			public void Render(World world) {}
 
-			public Cursor GetCursor(World world, int2 xy, MouseInput mi) { return Cursor.Ability; }
+			public string GetCursor(World world, int2 xy, MouseInput mi) { return "ability"; }
 		}
 	}
 }