tree 1248eecb6dbe3573a71055ddd1f1592096fb0d36
parent fe10b84e7f6c4c8c3dc8cf63be324bc13f5acd68
author Mauro Carvalho Chehab <m.chehab@samsung.com> 1409765546 -0300
committer Mauro Carvalho Chehab <m.chehab@samsung.com> 1409765886 -0300

[media] dmxdev: don't use before checking file->private_data

As reported by smatch:
	drivers/media/dvb-core/dmxdev.c:1091 dvb_demux_poll() warn: variable dereferenced before check 'dmxdevfilter' (see line 1088)

This was introduced by changeset d102cac8097c.

We need to test before using it.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>