Can't compile ergo

[Gusions]

Hi, when i try to compile the first commit version of Ergo i have this error:

gusions@gusions-netbook:~/sorgentielementary/ergo/build$ make
[ 14%] Generating Ergo/Ergo.c, Ergo/SavedState.c, Ergo/Widgets/ErgoMenu.c, Ergo/Widgets/ErgoToolbar.c, Ergo/Widgets/ErgoWindow.c, Ergo/Widgets/ErgoTaskView.c
/home/gusions/sorgentielementary/ergo/Ergo/Widgets/ErgoWindow.vala:57.3-57.38: error: overriding method `Ergo.Widgets.ErgoWindow.delete_event' is incompatible with base method `Gtk.Widget.delete_event': incompatible type of parameter 1.
  protected override bool delete_event (EventAny event) {
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/home/gusions/sorgentielementary/ergo/Ergo/Widgets/ErgoWindow.vala:57.3-57.38: error: Ergo.Widgets.ErgoWindow.delete_event: no suitable method found to override
  protected override bool delete_event (EventAny event) {
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation failed: 2 error(s), 0 warning(s)
make[2]: *** [Ergo/Ergo.c] Errore 1
make[1]: *** [CMakeFiles/ergo.dir/all] Errore 2
make: *** [all] Errore 2

[Kārlis Lukstiņš (karlis-lukstins)]

The same thing happens when i remove the line "using Gdk;" from ErgoWindow.vala