minor fix for CloneRowTriggersToPartition - Mailing list pgsql-hackers

Hi.

I think we should apply the attached patch so that a CreateTriggerStmt
that CloneRowTriggersToPartition creates for a partition doesn't contain
pointers that point to the information in the parent table's relcache,
which may go stale before the pointers in question are used.

Thanks,
Amit