media: uvcvideo: Allow entities with no pads
[ Upstream commit 7532dad6 ] Avoid an underflow while calculating the number of inputs for entities with zero pads. Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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