Fix tile indexing

Distribution/GameData/ConformalDecals/Plugins/ConformalDecals.dll

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:d92c2a36eb1b8d61ae8459b7a40d1cfc20a75cd28ef73d829e45f6e4f83e020d
+oid sha256:8c0cdc1e59cda8543d4982273469cf0bd577130fd451dc4ac219748f5e1ac9df
 size 34816

Source/ConformalDecals/MaterialModifiers/MaterialPropertyCollection.cs

@@ -212,10 +212,9 @@ namespace ConformalDecals.MaterialModifiers {
 
         public void UpdateTile(int index, Vector2 tileSize) {
             int tileCountX = (int) (_mainTexture.Width / tileSize.x);
-            int tileCountY = (int) (_mainTexture.Height / tileSize.y);
 
             int x = index % tileCountX;
-            int y = index / tileCountY;
+            int y = index / tileCountX;
 
             var tile = new Rect(x * tileSize.x, y * tileSize.y, tileSize.x, tileSize.y);