[meld/ui-next] ui.vcdialogs: Fix missing callback decorator from template migration

[Kai Willadsen <kaiw src gnome org>]

commit 7accc089c935f75f60d43e906677db281e5233af
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Feb 24 08:45:49 2019 +1000

    ui.vcdialogs: Fix missing callback decorator from template migration

 meld/ui/vcdialogs.py | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/meld/ui/vcdialogs.py b/meld/ui/vcdialogs.py
index 4f761bce..90387057 100644
--- a/meld/ui/vcdialogs.py
+++ b/meld/ui/vcdialogs.py
@@ -101,6 +101,7 @@ class CommitDialog(Gtk.Dialog):
         self.destroy()
         return response, msg
 
+    @Template.Callback()
     def on_previousentry_activate(self, gentry):
         idx = gentry.get_active()
         if idx != -1: