media: dvb: Fix buffer check for DVR output buffer
media: dvb: Fix buffer check for DVR output buffer

Incorrect buffer checking was done in case DVR device is opened
as the output device for a recording filter.

Change-Id: I52480a606eb53e9fe37ceec5e9addac671fd300f
Signed-off-by: Gilad Broner <822e83f36b3b682c554ad5bd6c83a8c459cdae33@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas