Fixes access to TextureUtil.uploadTextureSub

Since TextureUtil.uploadTextureMipmap is private, I used the next available function which does the same thing with a needless for loop in our case. It, however, is public static
:)

codechicken/lib/render/TextureSpecial.java

@@ -65,7 +65,8 @@ public class TextureSpecial extends TextureAtlasSprite implements IIconSelfRegis
         if (textureFX != null) {
             textureFX.update();
             if (textureFX.changed())
-                TextureUtil.uploadTextureSub(0, textureFX.imageData, width, height, originX, originY, false, false, false);
+                //TextureUtil.uploadTextureSub(0, textureFX.imageData, width, height, originX, originY, false, false, false); not accessible
+                TextureUtil.uploadTextureMipmap(new int[][]{textureFX.imageData}, width, height, originX, originY, false, false);
         }
     }