[gthumb] GthImageViewer: add scroll events to the window event mask

[Paolo Bacchilega <paobac src gnome org>]

commit a014e624c04cbb4ad09ea97e692af1faa18b6af8
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Apr 21 13:16:49 2012 +0200

    GthImageViewer: add scroll events to the window event mask

 gthumb/gth-image-viewer.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gthumb/gth-image-viewer.c b/gthumb/gth-image-viewer.c
index 0916658..f9a0489 100644
--- a/gthumb/gth-image-viewer.c
+++ b/gthumb/gth-image-viewer.c
@@ -410,6 +410,7 @@ gth_image_viewer_realize (GtkWidget *widget)
 				  | GDK_POINTER_MOTION_MASK
 				  | GDK_POINTER_MOTION_HINT_MASK
 				  | GDK_BUTTON_MOTION_MASK
+				  | GDK_SCROLL_MASK
 				  | GDK_STRUCTURE_MASK);
 
 	attributes_mask        = (GDK_WA_X