Thread: pgsql: Fix buggy usage of vsnprintf in PL/Python by removing it

Log Message:
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Fix buggy usage of vsnprintf in PL/Python by removing it altogether, instead
relying on stringinfo.c.  This fixes a problem reported by Marko Kreen, but I
didn't use his patch, per subsequent discussion.

Modified Files:
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    pgsql/src/pl/plpython:
        plpython.c (r1.104 -> r1.105)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/plpython.c?r1=1.104&r2=1.105)