[GRASS5] fixed lot's of compiler warnings

[Markus Neteler]

On Thu, Jul 14, 2005 at 01:54:02AM +0100, Glynn Clements wrote:
> 
> Markus Neteler wrote:
> 
> > as the subject says (valid for GRASS 6.1-CVS). This hopefully
> > improves the gcc4 and Fedora4 readiness...
> > 
> > Still todo for someone else:
> >  lib/display
> >  imagery/i.class
> >  imagery/i.ortho.photo/photo.2target
> >  imagery/i.ortho.photo/photo.2image
> >  imagery/i.points
> >  imagery/i.vpoints
> > 
> > All of them have this error (I dunno how to fix that):
> >  zoom_box.c:5: error: 'y1' redeclared as different kind of symbol
> >  zoom_box.c:5: error: 'y1' redeclared as different kind of symbol
> 
> Several options:
> 
> 1. Don't include <math.h> from gis.h, and unconditionally redefine
> M_PI, i.e.
> 
> 	#undef M_PI
> 	#define M_PI ...
> 
> rather than:
> 
> 	#ifdef M_PI
> 	#define M_PI ...
> 	#endif

I have implemented this solution.
Compiles now, thanks.

Markus