ThePimp: do not attempt to save a file if there is no open image.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2931 92316355-f0b4-4df1-b90c-862c8a59935f

ThePimp/MainWindow.cs

@@ -50,7 +50,7 @@ namespace ThePimp
             }
 
             while(notebook1.NPages > 0)
-                    notebook1.RemovePage(0);
+                notebook1.RemovePage(0);
             int n = notebook1.AppendPage(new PictureView(p),
                                          new Label(p.FileName));
             notebook1.Page = n;
@@ -86,6 +86,8 @@ namespace ThePimp
 
         protected virtual void OnSaveAsActionActivated (object sender, System.EventArgs e)
         {
+            if(notebook1.NPages <= 0)
+                return;
             SaveFile save = new SaveFile();
             PictureView view = notebook1.CurrentPageWidget as PictureView;
             save.Save(view.Picture);