configure check for ogg support

[Andreas Beckermann]

Hi all
In my game we use .ogg files to play sound and therefore I need to find out 
whether ogg support provided by arts.

Can I simply check for the existence of OGGPlayObject.mcopclass ? 
I.e.can I assume that ogg support is given when this file exists (as long as 
the installation isn't broken).

I've also written a configure check that tries to find out whether the mpeglib 
installation supports ogg files. Does libarts_mpeglib automatically support 
ogg files if mpeglib does? Even if mpeglib didn't do so when libarts_mpeglib 
was compiled?

Thanks for your help

CU
Andi