pgsql: Fix a couple minor typos

Fix a couple minor typos

In commit f0e4475, GetIndexOpClass was renamed to ResolveOpClass, but
the comment in typecmds.c didn't get the memo.

In objectaddress.c, missing 'of' in a comment.

Both noticed by Vik Fearing, patch is mine though.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/a0fefbcb718fedd8f0198f74c3ae27933c92b090

Modified Files
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src/backend/catalog/objectaddress.c | 2 +-
src/backend/commands/typecmds.c     | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)