fixes confbridge crash when no timing module is loaded.

(closes issue #16471)
Reported by: kjotte
Patches:
      M16471.diff uploaded by junky (license 177)
Tested by: kjotte, junky



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@247770 65c4cc65-6c06-0410-ace0-fbb531ad65f3

bridges/bridge_softmix.c

@@ -99,6 +99,9 @@ static int softmix_bridge_create(struct ast_bridge *bridge)
 /*! \brief Function called when a bridge is destroyed */
 static int softmix_bridge_destroy(struct ast_bridge *bridge)
 {
+	if (!bridge->bridge_pvt) {
+		return -1;
+	}
 	ast_timer_close((struct ast_timer *) bridge->bridge_pvt);
 
 	return 0;