Content length for SIP INFO packets is incorrect in latest release

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What steps will reproduce the problem?
1. Setup an outbound call with r222 release of SIPML5
2.  Hit a DTMF digit
3.

What is the expected output? What do you see instead?

The expected output (which was working in previous releases of SIPML5) looks 
like

SEND: INFO ************:5060;transport=udp SIP/2.0
Via: SIP/2.0/WS 
*********************
Content-Type: application/dtmf-relay
Content-Length: 22
Max-Forwards: 70
Proxy-Authorization: Digest 
.................

Instead the Content length is set to 1.

This is has knock on effect with Freeswitch of DTMF packet being thrown away.

What version of the product are you using? On what operating system?

Please provide any additional information below.

Original issue reported on code.google.com by gbfa...@gmail.com on 17 Mar 2015 at 2:14

cavus38 / sipml5

Content length for SIP INFO packets is incorrect in latest release #216