[Cython] char* and NULL in log statements

[Greg Ewing]

Lisandro Dalcin wrote:
> Stefan, are you completelly sure that the performance implications of
> checking for NULL pointers is this case are noticeable enough as to do
> not follow the safe path?

Also keep in mind that this is only going to be done
when you're about to construct a Python string, which
is a fairly expensive operation.

-- 
Greg