Bug on Asterix 1.2.18/ SDP with encodingparameters

Recently we are testing Trixbox running on Asterix1.2.18 in our lab.environment and we have found that it has bug while working on proxies that sends SDP message containing a=rtpmap: /[/] as described on RFC2327.
Proxies send back the 200 OK with SDP message containing a=rtpmap:0 PCMU/8000/1, while the Asterix sends the original INVITE with a=rtpmap:0 PCMU/8000. While both are semantically equivalent (the absence of the /1 indicates that there is a single audio channel), I suspect there is a direct string match in the SDP handling code in the Asterix that does not take this into consideration.

Please any developers in this forum takes in consideration of this issue and create a patch at Asterix side for this bug?
I may provide you traces taken in lab. environment if you guide us.