#4 Improve stability for PgVersion

[Gerhard Häring]

Billy,

I seem to have a talent to provoke segfaults in
innocent software ;-)

import PgSQL
ver = PgSQL.connect().version
print coerce(ver, "")

currently leads to a segfault, because PgVersion_New
expects the input to be in a "reasonable" format. My
patch tries to make the function more tolerant to
garbage input, but it could need a little review,
before I or you commit it.

(In the process of trying to understand what strtok_r
is all about, I also tried to make the code easier to
understand - for me, at least).

[Gerhard Häring]

[Billy G. Allie]

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I've looked at the code and made a few changes. Take a look
and tell me what you think.

[Billy G. Allie]

[Gerhard Häring]

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Thanks for reviewing and improving the patch.

I've looked at your changes and after some testing, commited it.

I've also fixed the repr() function of the PgVersion object.