[mutter] clutter/x11: Set master device on pad button events

[Carlos Garnacho <carlosg src gnome org>]

commit 56c468a2ef4681b5ad3496b23978496224eeda0e
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jul 12 22:27:33 2017 +0200

    clutter/x11: Set master device on pad button events
    
    These should be set one, but just set the master to be the slave
    pad device. We are passively grabbing the pad device, so this is
    consistent with active grabs on slave devices. Besides, pads are
    paired to the VCP, which is not really truthful.
    
    Fixes inoffensive warnings when trying to check whether motion
    throttling applies for these events.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784881

 clutter/clutter/x11/clutter-device-manager-xi2.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter/x11/clutter-device-manager-xi2.c 
b/clutter/clutter/x11/clutter-device-manager-xi2.c
index 24d1432..97c3298 100644
--- a/clutter/clutter/x11/clutter-device-manager-xi2.c
+++ b/clutter/clutter/x11/clutter-device-manager-xi2.c
@@ -436,6 +436,9 @@ create_device (ClutterDeviceManagerXI2 *manager_xi2,
       node_path = get_device_node_path (backend_x11, info);
     }
 
+  if (source == CLUTTER_PAD_DEVICE)
+    is_enabled = TRUE;
+
   retval = g_object_new (CLUTTER_TYPE_INPUT_DEVICE_XI2,
                          "name", info->name,
                          "id", info->deviceid,
@@ -1224,6 +1227,7 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
 
             /* Pad buttons are 0-indexed */
             event->pad_button.button = xev->detail - 1;
+            clutter_event_set_device (event, device);
             clutter_event_set_source_device (event, source_device);
 
             CLUTTER_NOTE (EVENT,