cluster/afr: Prevent dict_set() on NULL dict

In afr lookup when NULL dict is received in lookup, afr
is supposed to set all the xattrs it requires in a new dict
it creates, but for 'link-count' it is trying to set to the
dict that is passed in lookup which can be NULL sometimes.
This is leading to error logs. Fixed the same in this patch.

 >BUG: 1385104
 >Change-Id: I679af89cfc410cbc35557ae0691763a05eb5ed0e
 >Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
 >Reviewed-on: http://review.gluster.org/15646
 >Smoke: Gluster Build System <jenkins@build.gluster.org>
 >NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
 >CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
 >Reviewed-by: Ravishankar N <ravishankar@redhat.com>

 >BUG: 1385236
 >Change-Id: I802e74e7ad24e183b6653101ad7bf5ab0bf6e55b
 >Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
 >Reviewed-on: http://review.gluster.org/15650
 >Smoke: Gluster Build System <jenkins@build.gluster.org>
 >CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
 >NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
 >Reviewed-by: Ravishankar N <ravishankar@redhat.com>

BUG: 1385442
Change-Id: Ie93b25e8cf52b0d58ef335929dfa10a78a0dd734
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/15651
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Ravishankar N <ravishankar@redhat.com>

0 files changed, 0 insertions, 0 deletions