pgsql: Compact for loops

Compact for loops

Declare loop variable in for loop, for readability and to save space.

Reviewed-by: Corey Huinker <corey.huinker@gmail.com>
Discussion: /messages/by-id/0ccdd3e1-10b0-dd05-d8a7-183507c11eb1@2ndquadrant.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/554ebf687852d045f0418d3242b978b49f160f44

Modified Files
--------------
src/backend/utils/adt/ri_triggers.c | 47 ++++++++++++++-----------------------
1 file changed, 17 insertions(+), 30 deletions(-)