From cc242206c6bb6df828ba56ee1207f0efb35dfa54 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Sat, 13 Jan 2007 03:04:55 +0000
Subject: [PATCH] Only join the snmp thread on an unload if the thread is
 actually running. (issue #8810 reported by junky)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@50674 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 res/res_snmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/res/res_snmp.c b/res/res_snmp.c
index 2ccadc4073..cbca08a419 100644
--- a/res/res_snmp.c
+++ b/res/res_snmp.c
@@ -106,7 +106,7 @@ static int unload_module(void)
 	ast_verbose(VERBOSE_PREFIX_1 "Unloading [Sub]Agent Module\n");
 
 	res_snmp_dont_stop = 0;
-	return pthread_join(thread, NULL);
+	return ((thread != AST_PTHREADT_NULL) ? pthread_join(thread, NULL) : 0);
 }
 
 static int reload(void)