Segmentation fault happens when read_csv loads a big csv file
Today I decided to upgrade pandas from 0.16.2 to 0.17.0, and I started to get a segmentation fault when reading a big csv file with the `read_csv` method. If I simply type the following code below in the python terminal, loading an 160Mb csv file, my script crashes displaying a segmentation fault message. Although, if I use smaller files it works properly.

``` python
>>> import pandas as pd
>>> df = pd.read_csv("big_csv.csv")
```

When downgrading back to 0.16.2, it starts to work again. If I use `engine='python'` argument, it also works. So, that's probably revealing some problem in the C engine.

I'm running everything on Ubuntu 14.04 x86_64
