[mutter] wayland: Forward touchpad pinch n_fingers information to clients

[Carlos Garnacho <carlosg src gnome org>]

commit 15db18901cdd4dc2f969363a94b3b8c636f6d431
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 3 13:32:18 2016 +0200

    wayland: Forward touchpad pinch n_fingers information to clients
    
    We used to hardcode 2 because those were the only events we used to
    handle. Now the ClutterTouchpadPinchEvent will tell us.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765937

 src/wayland/meta-wayland-pointer-gesture-pinch.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/src/wayland/meta-wayland-pointer-gesture-pinch.c 
b/src/wayland/meta-wayland-pointer-gesture-pinch.c
index f2f3a6e..7f5da22 100644
--- a/src/wayland/meta-wayland-pointer-gesture-pinch.c
+++ b/src/wayland/meta-wayland-pointer-gesture-pinch.c
@@ -38,18 +38,19 @@ handle_pinch_begin (MetaWaylandPointer *pointer,
   MetaWaylandPointerClient *pointer_client;
   MetaWaylandSeat *seat;
   struct wl_resource *resource;
-  uint32_t serial;
+  uint32_t serial, fingers;
 
   pointer_client = pointer->focus_client;
   seat = meta_wayland_pointer_get_seat (pointer);
   serial = wl_display_next_serial (seat->wl_display);
+  fingers = clutter_event_get_touchpad_gesture_finger_count (event);
 
   wl_resource_for_each (resource, &pointer_client->pinch_gesture_resources)
     {
       zwp_pointer_gesture_pinch_v1_send_begin (resource, serial,
                                                clutter_event_get_time (event),
                                                pointer->focus_surface->resource,
-                                               2);
+                                               fingers);
     }
 }