Merged revisions 104536 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r104536 | file | 2008-02-27 11:52:02 -0400 (Wed, 27 Feb 2008) | 4 lines

Only stop the MWI monitor thread if it was actually started.
(closes issue #12086)
Reported by: francesco_r

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@104537 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_smdi.c

@@ -1274,7 +1274,9 @@ static int unload_module(void)
 	ast_cond_signal(&mwi_monitor.cond);
 	ast_mutex_unlock(&mwi_monitor.lock);
 
+	if (mwi_monitor.thread != AST_PTHREADT_NULL) {
 		pthread_join(mwi_monitor.thread, NULL);
+	}
 
 	ast_custom_function_unregister(&smdi_msg_retrieve_function);
 	ast_custom_function_unregister(&smdi_msg_function);