Long table rows cause incorrect table conversions

- Version by `html2text.__version__`: (2016, 9, 19)
- Test script
```python
import html2text
conv = html2text.HTML2Text()
conv.pad_tables = True

print conv.handle('12jujuhuhu')
# 1 | 2
# -----|---------------------------------------------------------
# juju | [huhu](http://example.com/there/is/some/very/long/path)
conv.body_width = 40
print conv.handle('12jujuhuhu')
# 1
# --------------------------------------------------------
# juju
# [huhu](http://example.com/there/is/some/very/long/path)

```

- Python version `python --version`: 2.7.13