Merged revisions 100793 via svnmerge from

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

........
r100793 | crichter | 2008-01-29 11:36:19 +0100 (Di, 29 Jan 2008) | 1 line

fixed potential segfault in misdn show channels CLI command
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@100795 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_misdn.c

@@ -1251,10 +1251,19 @@ static char *handle_cli_misdn_show_channels(struct ast_cli_entry *e, int cmd, st
 	help = cl_te;
   
 	ast_cli(a->fd, "Channel List: %p\n", cl_te); 
-  
+
 	for (; help; help = help->next) {
 		struct misdn_bchannel *bc = help->bc;   
 		struct ast_channel *ast = help->ast;
+		if (!ast) {
+			if (!bc) {
+				ast_cli(a->fd, "chan_list obj. with l3id:%x has no bc and no ast Leg\n", help->l3id);
+				continue;
+			}
+			ast_cli(a->fd, "bc with pid:%d has no Ast Leg\n", bc->pid);
+			continue;
+		}
+
 		if (misdn_debug[0] > 2)
 			ast_cli(a->fd, "Bc:%p Ast:%p\n", bc, ast);
 		if (bc) {