[gnome-chess/gnome-3-16] Fix dragging the window after clicking the game view

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 813e026f7fd0be168826e8aa5317f39401b80f45
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Fri Sep 11 12:18:05 2015 -0500

    Fix dragging the window after clicking the game view
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754837

 src/chess-view.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/chess-view.vala b/src/chess-view.vala
index d1e3780..655bae4 100644
--- a/src/chess-view.vala
+++ b/src/chess-view.vala
@@ -37,7 +37,7 @@ public class ChessView : Gtk.DrawingArea
 
     public ChessView ()
     {
-        add_events (Gdk.EventMask.BUTTON_PRESS_MASK);
+        add_events (Gdk.EventMask.BUTTON_PRESS_MASK | Gdk.EventMask.BUTTON_RELEASE_MASK);
     }
 
     public override bool configure_event (Gdk.EventConfigure event)