Adding the '--quiet' argument to gnome.generate_gir() silences
informational build output such as what g-ir-scanner was called with.
Gtk and others do this, so why don't we as well?
#include"gntutils.h"
intmain()
{
GntWidget*win,*button;
gnt_init();
gnt_util_parse_widgets("<vwindow id='0' fill='0' align='2'><label>This is a test.</label><button id='1'>OK</button></vwindow>",2,&win,&button);