Memory leakage problem in native operations

com.mojang.blaze3d.platform.TextureUtil#readResource(inputStream) leads to memory leakage problem.

This method throws IOException. However, if it throws, this method won't return the native pointer so you can't free the memory via MemoryUtil.memFree(). For example, #readResourceAsString finally block, the ByteBuffer is null if an IOException is catched. This will take up more and more memory along with the game.

To solve this, add a catch block inside #readResource, free the memory first, and then throw the catched exception.

...
   ByteBuffer byteBuffer2 = null;
   try {
   // reading
   ...
   } catch (Throwable t) {
   MemoryUtil.memFree(byteBuffer2);
   throw t;
   }
 return byteBuffer2;