sg_copy_buffer() returns a size_t with the number of bytes copied.
Return 0 instead of false if the copy is skipped.
Signed-off-by: NDavid Disseldorp <ddiss@suse.de>
Reviewed-by: NDouglas Gilbert <dgilbert@interlog.com>
Reviewed-by: NJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>