Fix bug with Python 3.2 and Numpy 1.5.x. For the first format that is defined, if it is not deprecated, the length of the deprecated column is zero, and Numpy 1.5.x in Python 3.2 doesn't support
Merge pull request #1749 from astrofrog/issue-1749

Test failures with Python 3.1 and 3.2 with Numpy 1.5.x