Created attachment 90 [details]
Patch for loader.c to fix this bug

In file "loader.c" there is code:

if (*pIsMipmapped) {
	if (texinfo.generateMipmaps || header.numberOfMipmapLevels > 1)
		*pIsMipmapped = GL_TRUE;
	else
		*pIsMipmapped = GL_FALSE;
}

Documentation states that pIsMipmapped can be NULL, but in this case you will get Access Violation (derefrence from NULL). Also *pIsMipmapped will be only set if (*pIsMipmapped != 0), so result value pIsMipmapped from ktxLoadTextureF/N might be unreliable.

To fix it, change line:
  if (*pIsMipmapped) {
to:
  if (pIsMipmapped) {

(Patch included in attachment from latests svn sources)