modelgen boxcar array creation warning

[gciccarelli3]

Summary

Boxcar model gen warning with non integer array creation.

Actual behavior

Generates warning that will in the future cause error.

Expected behavior

Round length? Ceil, floor? Match another array in length?

How to replicate the behavior

import numpy as np
np.zeros((.5))

Platform details:

please paste the output of: python -c "import nipype; print(nipype.get_info())"
==> This command itself causes a crash due to problems with configparser and nipype using python 2.7, conda, and a clean pip install of nipype from last week.
backports.configparser.InterpolationSyntaxError: '%' must be followed by '%' or '(', found: u'%h'

Attempting to upgrade nipype fails with
pip install --upgrade fails with: no file or dir bin/easy_install-2.7
commit: ff36588

[mgxd]

fixed in #1808