[COMMITTERS] pgsql: Restore nodeAgg.c's ability to check for improperly-nested aggre

Restore nodeAgg.c's ability to check for improperly-nested aggregates. While poking around in the aggregate logic, I noticed that commit 8ed3f11bb broke the logic in nodeAgg.c that purports to detect nested aggregates, by moving initialization of regular aggregate argument expressions out of the c

[COMMITTERS] pgsql: Restore nodeAgg.c's ability to check for improperly-nested aggre

Restore nodeAgg.c's ability to check for improperly-nested aggregates. While poking around in the aggregate logic, I noticed that commit 8ed3f11bb broke the logic in nodeAgg.c that purports to detect nested aggregates, by moving initialization of regular aggregate argument expressions out of the c