Matt Burke 75aaf12a90 Try to be more POSIX-y? ...

`if ! command` appears to be invalid
(https://travis-ci.org/git-tfs/git-tfs/builds/18484621)

2014-02-11 11:57:55 -05:00

..

travis

Try to be more POSIX-y?

2014-02-11 11:57:55 -05:00