Merged revisions 317719 via svnmerge from

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

........
  r317719 | rmudgett | 2011-05-06 12:59:05 -0500 (Fri, 06 May 2011) | 11 lines
  
  Regression after r297603 (Improve handling of REGISTER requests with multiple contact headers.) 
  
  Uninitialized variable.
  
  (issue #18640)
  
  (closes issue #18785)
  Reported by: pnlarsson
  Patches:
        issue18785_enegaard.patch uploaded by enegaard (license 1197)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@317720 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -12759,7 +12759,7 @@ static enum parse_register_result parse_register_contact(struct sip_pvt *pvt, st
 	char *firstcuri = NULL;
 	int start = 0;
 	int wildcard_found = 0;
-	int single_binding_found;
+	int single_binding_found = 0;
 
 	ast_copy_string(contact, __get_header(req, "Contact", &start), sizeof(contact));