fixed issue, that if chan_misdn is loaded and couldn't be initialized it would cause a segfault after 'reload'. Reported by Drew/Matt thx.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@45808 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_misdn.c

@@ -64,6 +64,7 @@
 
 char global_tracefile[BUFFERSIZE+1];
 
+static int g_config_initialized=0;
 
 struct misdn_jb{
 	int size;
@@ -706,6 +707,11 @@ static char *misdn_get_ch_state(struct chan_list *p)
 static void reload_config(void)
 {
 	int i, cfg_debug;
+
+	if (!g_config_initialized) {
+		ast_log(LOG_WARNING, "chan_misdn is not initialized properly, still reloading ?\n");
+		return ;
+	}
 	
 	free_robin_list();
 	misdn_cfg_reload();
@@ -4091,7 +4097,6 @@ cb_events(enum event_e event, struct misdn_bchannel *bc, void *user_data)
  *******************************************/
 
 
-static int g_config_initialized=0;
 
 int load_module(void)
 {