Merged revisions 195089 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

........
  r195089 | file | 2009-05-18 10:36:17 -0300 (Mon, 18 May 2009) | 5 lines
  
  Fix a bug where specifying an empty outboundproxy would cause packets to get sent to ourself.
  
  (closes issue #15106)
  Reported by: timeshell
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@195090 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -2399,6 +2399,11 @@ static int proxy_update(struct sip_proxy *proxy)
 static struct sip_proxy *proxy_allocate(char *name, char *port, int force)
 {
 	struct sip_proxy *proxy;
+
+	if (ast_strlen_zero(name)) {
+		return NULL;
+	}
+
 	proxy = ast_calloc(1, sizeof(*proxy));
 	if (!proxy)
 		return NULL;