CSV with full column of 0.00 is read as integer instead of real

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create a CSV with a column only containining 0.00 value for each row
2. read_tbl in DataFrame
3. Query types

What is the expected output? What do you see instead?
I expected to get real to attach this table with another where this column type 
is real

Python 2.7.6 (default, Dec 12 2013, 14:16:02) 
[GCC 4.1.2 20080704 (Red Hat 4.1.2-48)] on linux2
pyvttbl 0.5.2.2

Original issue reported on code.google.com by jonathan...@gmail.com on 18 Mar 2015 at 1:37