libusbx/libusbx — pull request #151 by photron (2013-10-01 12:16:29+00:00)
Title: Windows: Avoid potential mismatch in transfer error reporting

The default case in windows_transfer_callback() calls windows_error_str(0)
which will convert the error code returned by GetLastError() to a string.
This currently works because windows_transfer_callback() is either called
with io_result set to NO_ERROR or io_result set to GetLastError().

If windows_transfer_callback() will ever be called with io_result set
differently then the default case might report the wrong error message.

Call windows_error_str(io_result) instead to avoid this.