[PATCH] ubifs: fix to check error code of register_shrinker

[Artem Bityutskiy]

On Tue, 2015-05-26 at 13:29 +0200, Richard Weinberger wrote:
> Am 26.05.2015 um 13:23 schrieb Chao Yu:
> > Ping.
> > 
> > Add Cc Richard Weinberger.
> 
> Patch looks good to me.
> Artem, if you don't mind I'd pick it up for the 4.2 queue.

Yes, please, thanks!

Signed-off-by: Artem Bityutskiy <artem.bityutskiy at linux.intel.com>