[xfce4] Mandatory compilation checks

[Olivier Fourdan]

Hi all,

Dear xfce4 lovely coders, please make sure all your programs compile
without warnings when using CFLAGS="-Wall -DGTK_DISABLE_DEPRECATED"

(Note, there is a very good chance that your code won't compile, which
means that it uses deprecated Gtk-1.2 functions that will go later)

FYI, I've made the test on xfwm4 and, yes, it succeeds now ;-)

Have fun,
-- 
Olivier               <fourdan at xfce.org>            http://www.xfce.org
-----------------------------------------------------------------------
XFce is a lightweight  desktop  environment  for  various *NIX systems. 
Designed for productivity,  it loads  and  executes  applications fast,
while conserving  system resources. XFce is all free software, released
under GNU General Public License.    Available from http://www.xfce.org