[XForms] Genuine API changes to forms.h, glcanvas.h since XForms0.89

[Trent Piepho]

On Tue, 18 May 2004, jason cipriani wrote:
> 
> There really shouldn't be any problem converting void returns to int returns other than function pointer problems and shared 
> library dynamic linking (dunno how it's done on non-Windows, and it may not even have a problem as C function names aren't 
> mangled based on their return value).

Why is it you want to change void returns to int returns, for functions that
don't return a value?  You get warning in the function is compiled:

bar.c:1: warning: `return' with no value, in function returning non-void