Move the ret check to the right level under if (pb). It is not
used by the code before that point if pb is NULL.
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>