Ctrl-C in select.epoll.poll() leads to crash on 32-bit x86

I have the following test code:

```
import select
epoll = select.epoll()
epoll.register(0, select.EPOLLIN)
epoll.poll()
```

It'll wait until there's data on stdin to read.  If you press ctrl-C then the poll returns with EINTR and is supposed to finish early.  On 64-bit x86-64 it works as expected (KeyboardInterrupt is raised) but on 32-bit x86 it leads to seg fault.

Any ideas?
