V4L/DVB (7459): Test cmd, not definition in decoder_command(), drivers/media/video/zoran_device.c

include/linux/video_decoder.h:
34:#define DECODER_SET_NORM	_IOW('d', 3, int)
35:#define DECODER_SET_INPUT	_IOW('d', 4, int)

untested, please confirm it's right.

Test cmd value, not definition of DECODER_SET_INPUT

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>