Another win32 locking issue

[Alexander Belchenko]

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This test in test_dirstate.py failed because dirstate file is locked:

    def test_initialize(self):
        expected_result = ([], [
            (('', '', 'TREE_ROOT'), # common details
             [('d', '', 0, False, dirstate.DirState.NULLSTAT), # current tree
             ])
            ])
        state = dirstate.DirState.initialize('dirstate')
        try:
            self.assertIsInstance(state, dirstate.DirState)
            lines = state.get_lines()
            self.assertFileEqual(''.join(state.get_lines()),
                'dirstate')
            self.check_state_with_reopen(expected_result, state)
        except:
            state.unlock()
            raise

Test failed at self.assertFileEqual.
This assert try to read file content from disk.
But win32 raise error on read operation with IOError 13 Permission denied,
although win32 allows to open file, but refuse to read this file.

Any hints?

[µ]
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