[ClusterLabs] attrd: Fix sigsegv on exit if initialization failed

[Vladislav Bogdanov]

Hi,

This was caught with 0.17.1 libqb, which didn't play well with long pids.

commit 180a943846b6d94c27b9b984b039ac0465df64da
Author: Vladislav Bogdanov <bubble at hoster-ok.com>
Date:   Mon Oct 12 11:05:29 2015 +0000

     attrd: Fix sigsegv on exit if initialization failed

diff --git a/attrd/main.c b/attrd/main.c
index 069e9fa..94e9212 100644
--- a/attrd/main.c
+++ b/attrd/main.c
@@ -368,8 +368,12 @@ main(int argc, char **argv)
      crm_notice("Cleaning up before exit");

      election_fini(writer);
-    crm_client_disconnect_all(ipcs);
-    qb_ipcs_destroy(ipcs);
+
+    if (ipcs) {
+        crm_client_disconnect_all(ipcs);
+        qb_ipcs_destroy(ipcs);
+    }
+
      g_hash_table_destroy(attributes);

      if (the_cib) {