Fix minor typo

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2607 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/sip.conf.sample

@@ -50,7 +50,7 @@ context = default		; Default context for incoming calls
 ; section defined below.
 ;
 ; Examples:
-,
+;
 ;register => 1234:password@mysipprovider.com	
 ;
 ;    Will call to the 's' extension