io.ascii daophot pprint crashes on row with INDEF

Input file (direct output from daophot)::

    #N IMAGE               XINIT     YINIT     ID    COORDS                 LID    \
    #U imagename           pixels    pixels    ##    filename               ##     \
    #F %-23s               %-10.3f   %-10.3f   %-6d  %-23s                  %-6d    
    #
    #N XCENTER    YCENTER    XSHIFT  YSHIFT  XERR    YERR            CIER CERROR   \
    #U pixels     pixels     pixels  pixels  pixels  pixels          ##   cerrors  \
    #F %-14.3f    %-11.3f    %-8.3f  %-8.3f  %-8.3f  %-15.3f         %-5d %-9s      
    #
    #N MSKY           STDEV          SSKEW          NSKY   NSREJ     SIER SERROR   \
    #U counts         counts         counts         npix   npix      ##   serrors  \
    #F %-18.7g        %-15.7g        %-15.7g        %-7d   %-9d      %-5d %-9s      
    #
    #N ITIME          XAIRMASS       IFILTER                OTIME                  \
    #U timeunit       number         name                   timeunit               \
    #F %-18.7g        %-15.7g        %-23s                  %-23s                   
    #
    #N RAPERT   SUM           AREA       FLUX          MAG    MERR   PIER PERROR   \
    #U scale    counts        pixels     counts        mag    mag    ##   perrors  \
    #F %-12.2f  %-14.7g       %-11.7g    %-14.7g       %-7.3f %-6.3f %-5d %-9s      
    #
    n8q624e8q_cal.fits[1]  76.102    2.280     1     test.stars             1      \
       76.150     2.182      0.048   -0.098  0.016   0.014          108  BadPixels \
       0.5378259      0.1369367      0.1002712      604    176      0    NoError   \
       1407.892       INDEF          F160W                  INDEF                  \
       4.00     0.            0.         0.            INDEF  INDEF 301  OffImage   
    n8q624e8q_cal.fits[1]  81.730    3.167     2     test.stars             2      \
       76.150     2.182      -5.580  -0.985  0.016   0.014          108  BadPixels \
       0.5378259      0.1369367      0.1002712      604    176      0    NoError   \
       1407.892       INDEF          F160W                  INDEF                  \
       4.00     0.            0.         0.            INDEF  INDEF 301  OffImage

Commands using the latest astropy master plus #510 fix:

    >>> from astropy.io import ascii
    >>> reader = ascii.Daophot()
    >>> photfile = reader.read('test.phot')
    >>> photfile.pprint(max_lines=1)

Error message::

    ---------------------------------------------------------------------------
    TypeError                                 Traceback (most recent call last)
    <ipython-input-20-edbd1f316045> in <module>()
    ----> 1 photfile.pprint(max_lines=1)

    /home/lib/python2.7/site-packages/astropy/table/table.pyc in pprint(self, max_lines, max_width, show_name, show_units)
       1054 
       1055         lines, n_header = _pformat_table(self, max_lines, max_width, show_name,
    -> 1056                                          show_units)
       1057         for i, line in enumerate(lines):
       1058             if i < n_header:

    /home/lib/python2.7/site-packages/astropy/table/pprint.pyc in _pformat_table(table, max_lines, max_width, show_name, show_units, html)
        256     for col in table.columns.values():
        257         lines, n_header = _pformat_col(col, max_lines, show_name,
    --> 258                                        show_units)
        259         cols.append(lines)
        260 

    /home/lib/python2.7/site-packages/astropy/table/pprint.pyc in _pformat_col(col, max_lines, show_name, show_units)
        128     """
        129     outs = {}  # Some values from _pformat_col_iter iterator that are needed here
    --> 130     col_strs = list(_pformat_col_iter(col, max_lines, show_name, show_units, outs))
        131     col_width = max(len(x) for x in col_strs)
        132 

    /home/lib/python2.7/site-packages/astropy/table/pprint.pyc in _pformat_col_iter(col, max_lines, show_name, show_units, outs)
        211                            format_func(col.format, col[(i,) + multidim1]))
        212             else:
    --> 213                 col_str = format_func(col.format, col[i])
        214             yield col_str
        215         elif i == i0:
    
    /home/lib/python2.7/site-packages/astropy/table/pprint.pyc in <lambda>(format_, val)
         96             if out == format_:
         97                 raise ValueError
    ---> 98             format_func = lambda format_, val: format_ % val
         99         except:
        100             raise ValueError('Unable to parse format string {0}'

    TypeError: float argument required, not numpy.string_

    ERROR: TypeError: float argument required, not numpy.string_ [astropy.table.pprint]

`pprint` works fine when I replaced "INDEF" with "0    " but I really don't want to do that to all my phot output files.