[media] v4l2-core/v4l2-ctrls: Filter NOOP CH_RANGE events
If modify_range is called but no range is changed, do not send the CH_RANGE event. Reported-by:Dimitrios Katsaros <patcherwork@gmail.com> Signed-off-by:
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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