On platforms without zlib, make this do the right thing and return the python

On platforms without zlib, make this do the right thing and return the python
2.x signed value.  Also, don't waste space on a table full of unsigned longs
when all it needs are unsigned ints (incase anyone builds this without zlib on
a 64-bit unix for some strange reason).

tested by forcing it to compile this version on both 32-bit and 64-bit linux.