2002-05-02 Erwann Chenede - <erwann.chenede@sun.com>

  * gdk/gdkscreen.c (gdk_screen_get_monitor_at_point):
  * gdk/gdkscreen.h :
  * gdk/x11/gdkscreen-x11.c :
  make gdk_screen_get_monitor_at_point cross platform instead
  of backend dependant. #80480
  * tests/testxinerama.c (main):
  changed the warning message.