48e059fa3c
At present, the RPiStream buffer ids == -1 indicates an invalid value. As a simplification, use id == 0 to indicate an invalid value. This allows for better code readability. As a consequence of this, use unsigned int for the buffer id values. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>