[gtk+] calendar: Set GDK_SCROLL_MASK explicitly

[Matthias Clasen <matthiasc src gnome org>]

commit 2927218a26d81c1300e5f7dea9f6f91fe4cf7afd
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Feb 23 14:45:18 2012 +0100

    calendar: Set GDK_SCROLL_MASK explicitly
    
    selecting for button press/release doesn't suffice anymore to
    get scroll events.

 gtk/gtkcalendar.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcalendar.c b/gtk/gtkcalendar.c
index 819adfc..8f548e4 100644
--- a/gtk/gtkcalendar.c
+++ b/gtk/gtkcalendar.c
@@ -1681,6 +1681,7 @@ gtk_calendar_realize (GtkWidget *widget)
   attributes.wclass = GDK_INPUT_ONLY;
   attributes.window_type = GDK_WINDOW_CHILD;
   attributes.event_mask = (gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK
+                           | GDK_SCROLL_MASK
                            | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK
                            | GDK_POINTER_MOTION_MASK | GDK_LEAVE_NOTIFY_MASK);