Fix issue with finding path to .jshintrc

[marrs]

On Windows 7, this script was climbing the directory tree 2 nodes at a time on its search for my .jshintrc (stored in my home directory under C:\Users\myusername). If I was in a directory that was nested by an odd number of children, the rc would never get found.

I have not tested this patch in a unix environment

[bemurphy]

I needed this for OSX as well, fixes a similar problem I had, too.

[ekashida]

This also fixes the problem for me. LGTM!

[macalinao]

Please pull

[kristoferjoseph]

@wookiehangover +1 pretty please