From 44b92f3819f701b7cc2b0a0c078b9ef085aa14f4 Mon Sep 17 00:00:00 2001
From: John Schember <john@nachtimwald.com>
Date: Thu, 7 May 2009 18:09:09 -0400
Subject: [PATCH] GUI convert: Don't try to convert when no books are selected.

---
 src/calibre/gui2/main.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/gui2/main.py b/src/calibre/gui2/main.py
index 97e4c24d53..0f55c1e3de 100644
--- a/src/calibre/gui2/main.py
+++ b/src/calibre/gui2/main.py
@@ -1047,7 +1047,7 @@ class Main(MainWindow, Ui_MainWindow, DeviceGUI):
             d = error_dialog(self, _('Cannot convert'),
                     _('No books selected'))
             d.exec_()
-            return [], []
+            return None
         return [self.library_view.model().db.id(r) for r in rows]
 
     def convert_bulk(self, checked):