improve test_is_ntfs_prefix_mandatory()

[suizokukan]

///////////////////////////////////////////////////////////////////////////////

def test_is_ntfs_prefix_mandatory(_path): """ test_is_ntfs_prefix_mandatory

---

    Return True if the _path is a path in a systemfile requiring the NTFS
    prefix for long filenames.
    ________________________________________________________________________

    PARAMETER
        _path : (str)the path to be tested

    RETURNED VALUE
        a boolean
"""
longpath = os.path.join(_path, "a"*250, "b"*250)
res = False

try:
    os.mkdir(longpath)
except IOError:
    res = True

if res is False:
    os.rmdir(longpath)

return res

[suizokukan]

longpath = os.path.normpath(os.path.abspath(os.path.expanduser(os.path.join(_path, "a"*250, "b"*250))))
res = False
try:
    os.mkdir(longpath)
except IOError:
    res = True

if res is False:
    os.rmdir(longpath)

return res

[suizokukan]

done : see version 0.2.1