glext missing

[Ann and Jason Edmeades]

Oops - Looks like a check got missed. Change the top of device.c to add:

#ifdef HAVE_GL_GLEXT_H        <--- Add this
#include <GL/glext.h>                        
#endif                        <---- and this
#include <GL/glxext.h>

Note the #include <GL/glxext.h> may need to go inside the #ifdef.

Apologies for these problems... We will sort them out asap. Can you
please let me know if this helps, and whether the glxext needs to be
inside the #ifdef as well

Jason