[baobab] Adjust to changes in Vala binding API

[Ryan Lortie <desrt src gnome org>]

commit 760fa0cb2e83cd3a1b39a2f9f02d809247e3b839
Author: Jürg Billeter <j bitron ch>
Date:   Wed Feb 12 07:41:27 2014 +0100

    Adjust to changes in Vala binding API
    
    This adjusts to the changes from
    https://bugzilla.gnome.org/show_bug.cgi?id=713240 and bumps the
    required Vala version.
    
    Based on patch by Ryan Lortie.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724204

 configure.ac          |    2 +-
 src/baobab-chart.vala |   10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f3a36ae..11dd4c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE",[The name of the gettext d
 AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
-AM_PROG_VALAC([0.21.1])
+AM_PROG_VALAC([0.23.2])
 PKG_PROG_PKG_CONFIG([0.22])
 
 ## don't rerun to this point if we abort
diff --git a/src/baobab-chart.vala b/src/baobab-chart.vala
index f5daf98..48e2f7a 100644
--- a/src/baobab-chart.vala
+++ b/src/baobab-chart.vala
@@ -516,7 +516,7 @@ namespace Baobab {
 
         protected override bool button_press_event (Gdk.EventButton event) {
             if (event.type == Gdk.EventType.BUTTON_PRESS) {
-                if (((Gdk.Event) (&event)).triggers_context_menu ()) {
+                if (event.triggers_context_menu ()) {
                     show_popup_menu (event);
                     return true;
                 }
@@ -544,17 +544,17 @@ namespace Baobab {
         }
 
         protected override bool scroll_event (Gdk.EventScroll event) {
-            Gdk.EventMotion *e = (Gdk.EventMotion *) (&event);
+            Gdk.EventMotion e = (Gdk.EventMotion) event;
             switch (event.direction) {
             case Gdk.ScrollDirection.LEFT:
             case Gdk.ScrollDirection.UP:
                 zoom_out ();
-                motion_notify_event (*e);
+                motion_notify_event (e);
                 break;
             case Gdk.ScrollDirection.RIGHT:
             case Gdk.ScrollDirection.DOWN:
                 zoom_in ();
-                motion_notify_event (*e);
+                motion_notify_event (e);
                 break;
             case Gdk.ScrollDirection.SMOOTH:
                 break;
@@ -661,4 +661,4 @@ namespace Baobab {
             return true;
         }
     }
-}
\ No newline at end of file
+}