[meld] Fix exceptions for VC v2 API

[Kai Willadsen <kaiw src gnome org>]

commit 8a049ee7d46eaf25cd585153251794bd22c9dcf4
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat May 4 08:51:45 2013 +1000

    Fix exceptions for VC v2 API

 meld/vcview.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meld/vcview.py b/meld/vcview.py
index 39192ac..c19ccc2 100644
--- a/meld/vcview.py
+++ b/meld/vcview.py
@@ -703,7 +703,7 @@ class VcView(melddoc.MeldDoc, gnomeglade.Component):
     def on_button_update_clicked(self, obj):
         try:
             self.vc.update(self._command, self._get_selected_files())
-        except AttributeError:
+        except NotImplementedError:
             self._command_on_selected(self.vc.update_command())
 
     def on_button_push_clicked(self, obj):
@@ -736,7 +736,7 @@ class VcView(melddoc.MeldDoc, gnomeglade.Component):
     def on_button_revert_clicked(self, obj):
         try:
             self.vc.revert(self._command, self._get_selected_files())
-        except AttributeError:
+        except NotImplementedError:
             self._command_on_selected(self.vc.revert_command())
 
     def on_button_delete_clicked(self, obj):