[Pyrex] Pyrex 0.9.2 treats buffer methods incorrectly

[Phillip J. Eby]

I just tried upgrading from Pyrex 0.7.2 to 0.9.2, and got errors claiming 
that the __getreadbuffer__, __getwritebuffer__, __getcharbuffer__, and 
__getsegcount__ special methods have a "void" return type and should not 
return values.

My understanding from the docs referenced on the "Special Methods" page was 
that these methods are supposed to return lengths.  See:

     http://www.python.org/doc/current/api/buffer-structs.html

which claims that these methods return integers.