Log Message:
-----------
Prevent to_char(interval) from dumping core on month-related formats
when a zero-month interval is given. Per discussion with Karel.
Also, some desultory const-labeling of constant tables. More could be
done along that line.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
formatting.c (r1.85 -> r1.86)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/formatting.c.diff?r1=1.85&r2=1.86)