lint check maps, too

closes #4187

OpenRA.Game/ModData.cs

@@ -76,8 +76,6 @@ namespace OpenRA
 			SpriteLoader = new SpriteLoader(new string[0], SheetBuilder);
 			VoxelLoader = new VoxelLoader();
 			CursorProvider.Initialize(Manifest.Cursors);
-
-			AvailableMaps = FindMaps();
 		}
 
 		public IEnumerable<string> Languages { get; private set; }
@@ -121,6 +119,11 @@ namespace OpenRA
 			FieldLoader.Translations = translations;
 		}
 
+		public void LoadMaps()
+		{
+			AvailableMaps = FindMaps();
+		}
+
 		public Map PrepareMap(string uid)
 		{
 			LoadScreen.Display();