Quick update to AVChat (build 1618)

Just a small update to AVChat today with 2 minor fixes:

• fixed issue with Red5 where users leaving the chat all together would still be present in the external XML rooms & users list under the <not_in_rooms> XML tag
• The Push To Talk button now has a red background that makes it more visible:

As usual you can download it from your private client area.

Only the .swf files and the Red5 media server files have been changed since the last build.