[gtk+] xi2: Set ::num-touches for touch devices

[Matthias Clasen <matthiasc src gnome org>]

commit a4a7740b2fb73dd70d4462a3d6e2e61bb6ef7820
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Feb 25 08:25:50 2016 -0500

    xi2: Set ::num-touches for touch devices
    
    XI2 has this information, so pass it on.

 gdk/x11/gdkdevicemanager-xi2.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/x11/gdkdevicemanager-xi2.c b/gdk/x11/gdkdevicemanager-xi2.c
index a667c49..a3450ad 100644
--- a/gdk/x11/gdkdevicemanager-xi2.c
+++ b/gdk/x11/gdkdevicemanager-xi2.c
@@ -487,6 +487,7 @@ create_device (GdkDeviceManager *device_manager,
                          "device-id", dev->deviceid,
                          "vendor-id", vendor_id,
                          "product-id", product_id,
+                         "num-touches", num_touches,
                          NULL);
 
   translate_device_classes (display, device, dev->classes, dev->num_classes);