protocol/client: Unserialize xdata even if lookup fails

Problem:
AFR relies on xdata returned by lookup to determine if
there are any files that need healing. This info is further
used to optimize readdirp.

In case of lookups with negative return value, client
xlator was sending NULL xdata. Due to absence of xdata,
AFR conservatively assumes that there are files that
need healing, which is incorrect.

Solution:
Even in case of unsuccessful lookups, send the xdata received
by protocol client so that higher xlators can get the info
that they rely on.

Change-Id: Id3a1023eb536180888eb2c0b39050000b76f7226
BUG: 1366284
Signed-off-by: Anuradha Talur <atalur@redhat.com>
Reviewed-on: http://review.gluster.org/15120
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Poornima G <pgurusid@redhat.com>
Tested-by: Poornima G <pgurusid@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Ashish Pandey <aspandey@redhat.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

0 files changed, 0 insertions, 0 deletions