NO-JIRA: fix compiler "unused variable" error in release builds

Project: http://git-wip-us.apache.org/repos/asf/qpid-dispatch/repo
Commit: http://git-wip-us.apache.org/repos/asf/qpid-dispatch/commit/ab43cf19
Tree: http://git-wip-us.apache.org/repos/asf/qpid-dispatch/tree/ab43cf19
Diff: http://git-wip-us.apache.org/repos/asf/qpid-dispatch/diff/ab43cf19

Branch: refs/heads/master
Commit: ab43cf19d5d26b7b57e982332fbe4355caaf70a8
Parents: e39ef7b
Author: Alan Conway <acon...@redhat.com>
Authored: Fri May 18 10:05:49 2018 -0400
Committer: Alan Conway <acon...@redhat.com>
Committed: Thu May 24 14:49:32 2018 -0400

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 src/policy.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
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http://git-wip-us.apache.org/repos/asf/qpid-dispatch/blob/ab43cf19/src/policy.c
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diff --git a/src/policy.c b/src/policy.c
index b1a231d..ae93c18 100644
--- a/src/policy.c
+++ b/src/policy.c
@@ -840,9 +840,8 @@ bool qd_policy_host_pattern_add(qd_policy_t *policy, char 
*hostPattern)
     void *oldp = qd_parse_tree_add_pattern_str(policy->hostname_tree, 
hostPattern, hostPattern);
     if (oldp) {
         void *recovered = qd_parse_tree_add_pattern_str(policy->hostname_tree, 
(char *)oldp, oldp);
-        if (!recovered) {
-            assert (recovered);
-        }
+        assert (recovered);
+        (void)recovered;        /* Silence compiler complaints of unused 
variable */
     }
     sys_mutex_unlock(policy->tree_lock);
     if (oldp)


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