[mutter] clutter: Add n_fingers field to ClutterTouchpadPinchEvent

[Carlos Garnacho <carlosg src gnome org>]

commit 4186833df76c05becf96de32ae87ce090a9445b3
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 3 13:28:56 2016 +0200

    clutter: Add n_fingers field to ClutterTouchpadPinchEvent
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765937

 clutter/clutter/clutter-event.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter/clutter-event.h b/clutter/clutter/clutter-event.h
index 5478f1d..88f899e 100644
--- a/clutter/clutter/clutter-event.h
+++ b/clutter/clutter/clutter-event.h
@@ -459,6 +459,7 @@ struct _ClutterTouchpadPinchEvent
   gfloat dy;
   gfloat angle_delta;
   gfloat scale;
+  guint n_fingers;
 };
 
 /**