[FIX] Call unlink_action in the model's unlink() method

mass_editing/mass_editing.py

@@ -96,6 +96,10 @@ class mass_object(osv.osv):
                 raise osv.except_osv(_("Warning"), _("Deletion of the action record failed."))
         return True
 
+    def unlink(self, cr, uid, ids, context=None):
+        self.unlink_action(cr, uid, ids, context)
+        return super(mass_object, self).unlink(cr, uid, ids, context)
+
 mass_object()
 
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