Created attachment 91 [details]
Patch for loader.c to fix memory leak (and check result code)

After successful _ktxUnpackETC call (in loader.c), memory allocated for 'unpacked' variable (inside function) is not released after using, so leaking memory - in my case total leak is about 0,5MB per mip-mapped texture:

_ktxUnpackETC(data, &unpacked, pixelWidth, pixelHeight);
glTexImage2D(texinfo.glTarget + face, level, 
	GL_RGB, pixelWidth, pixelHeight, 0, 
	GL_RGB, GL_UNSIGNED_BYTE, unpacked);

Also there is no result code check.
Suggested fix (also as a patch in attachment):

errorCode = _ktxUnpackETC(data, &unpacked, pixelWidth, pixelHeight);
if (errorCode != KTX_SUCCESS) {
	goto cleanup;
}
glTexImage2D(texinfo.glTarget + face, level, 
	GL_RGB, pixelWidth, pixelHeight, 0, 
	GL_RGB, GL_UNSIGNED_BYTE, unpacked);
free(unpacked);