[meld/meld-1.6] Check tree path validity when popping up menus (closes rhbz#843879)

[Kai Willadsen <kaiw src gnome org>]

commit 181808af06daa0ac6fae8a8ddb65bf862ccdc609
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Fri Oct 12 17:46:02 2012 +1000

    Check tree path validity when popping up menus (closes rhbz#843879)

 meld/dirdiff.py |    2 ++
 meld/vcview.py  |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/meld/dirdiff.py b/meld/dirdiff.py
index 88c8365..fd6a9fb 100644
--- a/meld/dirdiff.py
+++ b/meld/dirdiff.py
@@ -995,6 +995,8 @@ class DirDiff(melddoc.MeldDoc, gnomeglade.Component):
         if event.button == 3:
             treeview.grab_focus()
             path = treeview.get_path_at_pos(int(event.x), int(event.y))
+            if path is None:
+                return False
             selection = treeview.get_selection()
             model, rows = selection.get_selected_rows()
 
diff --git a/meld/vcview.py b/meld/vcview.py
index 3e44ff1..98bc08b 100644
--- a/meld/vcview.py
+++ b/meld/vcview.py
@@ -429,6 +429,8 @@ class VcView(melddoc.MeldDoc, gnomeglade.Component):
     def on_button_press_event(self, treeview, event):
         if event.button == 3:
             path = treeview.get_path_at_pos(int(event.x), int(event.y))
+            if path is None:
+                return False
             selection = treeview.get_selection()
             model, rows = selection.get_selected_rows()