Log Message:
-----------
Add regression test for various power expressions with a zero base, and
adjust source code to be more modular.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
numeric.c (r1.111 -> r1.112)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/numeric.c?r1=1.111&r2=1.112)
pgsql/src/test/regress/expected:
float8.out (r1.25 -> r1.26)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/float8.out?r1=1.25&r2=1.26)
pgsql/src/test/regress/sql:
float8.sql (r1.15 -> r1.16)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/float8.sql?r1=1.15&r2=1.16)