[gtk+/gtk-2-24] gtk: fix scrolling in modal dialogs when event_widget is insensitive

[Michael Natterer <mitch src gnome org>]

commit 31ae1a0b5bb257c86cc2393e065ded8506b4ef4a
Author: Michael Natterer <mitch gimp org>
Date:   Fri Dec 14 14:30:31 2012 +0100

    gtk: fix scrolling in modal dialogs when event_widget is insensitive
    
    When checking for modal grabs in gtk_main_do_event(), forward
    GDK_SCROLL events to event_widget, even if it is insensitive.

 gtk/gtkmain.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index 5a88679..56c92db 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -1557,7 +1557,7 @@ gtk_main_do_event (GdkEvent *event)
        *  then we send the event to the original event widget.
        *  This is the key to implementing modality.
        */
-      if (gtk_widget_is_sensitive (event_widget) &&
+      if ((gtk_widget_is_sensitive (event_widget) || event->type == GDK_SCROLL) &&
 	  gtk_widget_is_ancestor (event_widget, grab_widget))
 	grab_widget = event_widget;
     }