Bug#519995: libopenal0 replaced by libopenal1 but not compatible

[Paul Bransford]

Package: libopenal1
Version: 1:1.4.272-2

The package libopenal1 is marked as replacing libopenal0a, however
libopenal1 is not compatible with libopenal0a, and does not provide the
same .so files.

Please provide libopenal0a as a seperate package and adjust the package
details accordingly so that they may coexist - both libraries occupy
seperate files and should not interfere with each other.

Some applications (and indeed, some Debian packages) can make use of
OpenAL if libopenal.so.0 is present, but are not able to make use of
libopenal.so.1 due to API changes.