Pandas returns 0/y=inf, even when y is a non-zero dataframe or series.

Pandas returns the wrong result for the operation **0/y** where **y** is a dataframe or series of non-zero values:

``` python
import pandas as pd
y=pd.Series(range(1,10))
print 0/y # wrong
```

However, this operation would work:

``` python
for i in y:print 0/i # correct
```

I'm using Pandas 0.15.2-1.
