osutil: use PyLongObject on Python 3 for listdir_slot
This code looks performance sensitive. So let's retain PyIntObject on
Python 2 and use PyLongObject explicitly on Python 3.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true