Also save the error detail in SPIError

Peter Eisentraut <peter_e@gmx.net>

Commit: 418df3a5dd94d9f02b895f9c161b2435d61e0729
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2011-01-26T22:35:28Z
Releases: 9.1.0
Also save the error detail in SPIError

The temporarily broken plpython_unicode test shows a case where this
is used.

Do remaining fix-ups on the expected files at the same time.

Files