features/quota: get the top xlator from the active graph outside the list

In quota reconfigure we were getting the top of the active graph within the
list which contains the limits set on the volume. Suppose the list is empty,
then the code inside the list traversal loop is not executed, and thus top
will be NULL which might lead to segfault when accessed later.

Change-Id: I1648d69256490878339294537e17300399ddbf2c
BUG: 822827
Signed-off-by: Raghavendra Bhat <raghavendrabhat@gluster.com>
Reviewed-on: http://review.gluster.com/3364
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

0 files changed, 0 insertions, 0 deletions