[COMMITTERS] pgsql: Constify numeric.c.

Constify numeric.c.

This allows the compiler/linker to move the static variables to a
read-only segment.  Not all the signature changes are necessary, but
it seems better to apply const in a consistent manner.

Reviewed-By: Tom Lane
Discussion: https://postgr.es/m/20170910232154.asgml44ji2b7lv3d@alap3.anarazel.de

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/c1898c3e1e235ae35b4759d233253eff221b976a

Modified Files
--------------
src/backend/utils/adt/numeric.c | 212 +++++++++++++++++++++-------------------
1 file changed, 111 insertions(+), 101 deletions(-)


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