[CM] building cm3/Grace on linux

[Bill Schottstaedt]

> ../../src/demos/OpenGLDemo.cpp:48:22: warning: GL/glut.h: No such file 
> or directory 

I get this also -- I rebuilt freeglut from the sources (you have to
remove -Werror in src/Makefile), and built jucedemo, and
I get:

ALSA device: hw:M66,0 outs=10-10 ins=12-12 rates=6
ALSA error: Invalid argument

I tried uncommenting the JUCE_ALSA macro, rebuilt everything
and still got that error.