Hi all,

I tried a compile of Csound5 on OSX 10.3.5 and got an error at the 
linking stage, looking for "_rtclose_".  I was compiling without 
portaudio.  I looked around and saw a few places where rtclose_ was
being called.  For the case of if portaudio isn't used and no realtime
is set, should an empty stub function be declared for rtclose_ ?  And is
there an appropriate place to do that?

Thanks,
steven