Silent a warning from coverity about icmap_track being used without assign

Signed-off-by: Steven Dake <sdake@redhat.com>
Reviewed-by: Angus Salkeld <asalked@redhat.com>

exec/votequorum.c

@@ -750,7 +750,7 @@ static void votequorum_refresh_config(
 
 static void votequorum_exec_add_config_notification(void)
 {
-	icmap_track_t icmap_track;
+	icmap_track_t icmap_track = NULL;
 
 	ENTER();