[cheese] Disable the preferences action while shooting

[David King <davidk src gnome org>]

commit 7ab9209f06b89f6f830169f1f3e4a2afda2c44aa
Author: David King <amigadave amigadave com>
Date:   Tue Sep 3 17:53:13 2013 +0100

    Disable the preferences action while shooting
    
    Changing the resolution or camera device while recording can lead to a
    crash, so avoid the problem by disabling the preferences action whenever
    the mode change actions are disabled. Fixes bug 670782.

 src/cheese-window.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/cheese-window.vala b/src/cheese-window.vala
index a406288..4585a66 100644
--- a/src/cheese-window.vala
+++ b/src/cheese-window.vala
@@ -381,6 +381,8 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
         mode.set_enabled (true);
         var effects = this.application.lookup_action ("effects") as SimpleAction;
         effects.set_enabled (true);
+        var preferences = this.application.lookup_action ("preferences") as SimpleAction;
+        preferences.set_enabled (true);
     }
 
     /**
@@ -392,6 +394,8 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
         mode.set_enabled (false);
         var effects = this.application.lookup_action ("effects") as SimpleAction;
         effects.set_enabled (false);
+        var preferences = this.application.lookup_action ("preferences") as SimpleAction;
+        preferences.set_enabled (false);
     }
 
   /**