[gnome-mines] Fixed deprecated ungrab warning

[Robert Roth <robertroth src gnome org>]

commit bf7740d544d32f59a505cba58c12307c16365253
Author: Robert Roth <robert roth off gmail com>
Date:   Wed Nov 2 09:05:55 2016 +0200

    Fixed deprecated ungrab warning

 src/tile.vala |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/tile.vala b/src/tile.vala
index 34260ea..7a40b1d 100644
--- a/src/tile.vala
+++ b/src/tile.vala
@@ -47,7 +47,8 @@ public class Tile : Gtk.Button
         {
             /* By default windows with both button press and button release
              * grab Gdk events, ungrab events here for other tiles. */
-            event.device.ungrab (event.time);
+            event.get_seat().ungrab ();
+//            event.device.ungrab (event.time);
 
             tile_pressed (prow, pcol, event);
             return false;