Use gtk_size_request_get_size() instead deprecated gtk_widget_size_request()

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=629598

Signed-off-by: Javier Jardón <jjardon@gnome.org>
Signed-off-by: Tristan Van Berkom <tristanvb@openismus.com>

modules/input/gtkimcontextxim.c

@@ -1695,8 +1695,9 @@ on_status_toplevel_configure (GtkWidget         *toplevel,
 
       gdk_window_get_frame_extents (gtk_widget_get_window (toplevel),
                                     &rect);
-      gtk_widget_size_request (status_window->window, &requisition);
-      
+      gtk_size_request_get_size (GTK_SIZE_REQUEST (status_window->window),
+                                 &requisition, NULL);
+
       if (rect.y + rect.height + requisition.height < height)
 	y = rect.y + rect.height;
       else