[MERGE] Fixed bug related to test_iter_changes_new breakage on Windows

[Alexander Belchenko]

Alexander Belchenko has voted -0.
Status is now: Semi-approved
Comment:
I think this patch fix bug in wrong place.

The main question: *why* this test pass on Linux and fails on Windows?
Probably because some core functions on Windows behaves differently?
In this case we need to fix bzrlib core, not the test.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C461E1FE4.90108%40hlabs.spb.ru%3E