pgsql: Backpatch to 7.4 the part of 1.84 (from the 8.0 timeline) that

Log Message:
-----------
Backpatch to 7.4 the part of 1.84 (from the 8.0 timeline) that wasn't already
patched, viz. str_numth(). The rest of that patch was already applied as part
of 1.69.2.1. Per report and patch from Andreas 'ads' Scherbaum.

The involved revisions were:

revision 1.84
date: 2005-01-12 22:40:13 -0300; author: tgl; state: Exp; lines: +9 -7;
branches: 1.84.4;
Remove unportable assumption that it's okay to use the target buffer
of an sprintf() as a source string. Demonstrably does not work with
recent gcc and/or glibc on some platforms.

and

revision 1.69.2.1
date: 2005-03-25 20:42:21 -0400; author: tgl; state: Exp; lines: +24 -8;
Prevent to_char(interval) from dumping core on month-related formats
when a zero-month interval is given. Per discussion with Karel.

Tags:
----
REL7_4_STABLE

Modified Files:
--------------
pgsql/src/backend/utils/adt:
formatting.c (r1.69.2.2 -> r1.69.2.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/formatting.c?r1=1.69.2.2&r2=1.69.2.3)