Remove unusued field

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@252178 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/rtp.c

@@ -175,7 +175,6 @@ struct ast_rtp {
 	struct sockaddr_in strict_rtp_address;  /*!< Remote address information for strict RTP purposes */
 
 	int set_marker_bit:1;           /*!< Whether to set the marker bit or not */
-	unsigned int constantssrc:1;
 	struct rtp_red *red;
 };