FAQ update

[Brengard Pierre <brengard ens-info u-strasbg fr>]

Hi,

I have worked with progress bars and remarked that the section 5.14 of
the FAQ is false.
To force the drawing queue to be processed, you have to use
 while (g_main_iteration (FALSE));	and not   while (gtk_main_iteration
(FALSE));

Perhaps a little problem, but i have spent a lot of time on it. So, it
could be very 
useful to other gtk users to know it (i think).

A la prochaine

P. B.