[quadrapassel] Prevent unpause when game is over

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 694191bbfcdd79dd47f443796bf3ddab12994097
Author: Tomi Leppänen <tomi leppanen telemail fi>
Date:   Mon Sep 19 22:10:00 2016 +0300

    Prevent unpause when game is over
    
    Prevents pause key action when the game is over.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771541

 src/quadrapassel.vala |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/quadrapassel.vala b/src/quadrapassel.vala
index 9a1ea81..2d297b2 100644
--- a/src/quadrapassel.vala
+++ b/src/quadrapassel.vala
@@ -564,7 +564,8 @@ public class Quadrapassel : Gtk.Application
 
         if (keyval == upper_key (settings.get_int ("key-pause")))
         {
-            game.paused = !game.paused;
+            if (!game.game_over)
+                game.paused = !game.paused;
             return true;
         }