static int jp2_pclr_putdata(jp2_box_t *box, jas_stream_t *out)
{
#if 0
	jp2_pclr_t *pclr = &box->data.pclr;
#endif
	/* Eliminate warning about unused variable. */
	box = 0;
	out = 0;
	return -1;
}
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.