pgsql: Fix get_object_address argument type for extension statement

Fix get_object_address argument type for extension statement

Commit 3f88672a4 neglected to update the AlterExtensionContentsStmt
production in the grammar to use TypeName to represent types when
passing objects to get_object_address.

Reported as a pg_upgrade failure by Jeff Janes.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/5c5ffee80f3547625021c29f45b37321d8c710bf

Modified Files
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src/backend/parser/gram.y |    8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)