The offset variable is introduced to FrameBuffer::Plane. In order to
detect that the plane is used while the offset is not set, this adds
the assertion to FrameBuffer::planes(). It should be removed in the
future.
Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>