[gnome-documents] mainWindow: don't just hide the toolbar when there's a load error

[Cosimo Cecchi <cosimoc src gnome org>]

commit 9051a49bd32ba35cbc55a7ddee81226f1a21f420
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Fri Feb 8 17:46:13 2013 -0500

    mainWindow: don't just hide the toolbar when there's a load error
    
    Go back to the overview on Escape instead.

 src/mainWindow.js |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/mainWindow.js b/src/mainWindow.js
index e5dbe9c..1fcc9d1 100644
--- a/src/mainWindow.js
+++ b/src/mainWindow.js
@@ -172,8 +172,9 @@ const MainWindow = new Lang.Class({
 
         if (keyval == Gdk.KEY_Escape) {
             let preview = this._embed.getPreview();
+            let model = preview.getModel();
 
-            if (preview.controlsVisible)
+            if (preview.controlsVisible && (model != null))
                 preview.controlsVisible = false;
             else if (fullscreen)
                 Application.documentManager.setActiveItem(null);