[Pyrex] Reraise not inside except clause

[Robert Kern]

Robert Kern wrote:

> It looks like every time he "raise"s, he's already grabbing the current
> exception object. Most likely, that can be changed to "raise err".

I wish I could test this, but the swig_sources() problem described in "pyrex
imcompatibility with SWIG/setuptools" is preventing me.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco