[Osalp-dev] More changes

[<for...@ad...>]

I have made more changes to the sox module:

1) Fixed bug with sox source code. AU format A-LAW encoding
   read mode was missing a break statement in a switch statement.
   Notified sox maintainer.

2) Fixed G721 encoding AU format read mode. Still has problems but
   much better now.

3) AIFC read format was not allowing markers without instruments.
Changed
   source code to allow markers. My docs says that this is OK.

Bruce Forsberg