Bugix for obnam diff

> bzr diff
=== modified file 'obnamlib/plugins/show_plugin.py'
--- obnamlib/plugins/show_plugin.py 2012-09-04 19:33:56 +0000
+++ obnamlib/plugins/show_plugin.py 2012-10-10 21:35:18 +0000
@@ -234,6 +234,7 @@
                 self.show_diff_for_file(gen2, full, '+')
         for basename in sorted(set1):
             # This was only in gen1 - it got removed
+            full = os.path.join(dirname, basename)
             self.show_diff_for_file(gen1, full, '-')

         for subdir in subdirs: