hgview #7350 Fix too many values to unpack errors [rejected]

The console in which I launch hgview has several occurences of

Traceback (most recent call last):
 File "/home/alf/dev/public/hgview/hgview/gtk/hgview_gtk.py", line 595, in selection_changed
   buff, changes = self.repo.diff(self.repo.parents(node), node, rnode.files)
ValueError: too many values to unpack
prioritynormal
typebug
done in0.10.2
load0.200
load left0.000
closed by<not specified>