Report Python errors from iterators with PLy_elog

This improves reporting, as the error string now includes the actual
Python exception. As a side effect, this no longer sets the errcode to
ERRCODE_DATA_EXCEPTION, which might be considered a feature, as it's
not documented and not clear why iterator errors should be treated
differently.

Jan Urbański

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/8f76324352986287c04832f8e6450d4d2952a030

Modified Files
--------------
src/pl/plpython/plpython.c |    4 +---
1 files changed, 1 insertions(+), 3 deletions(-)

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