pgsql: Add two missing cases to ATWrongRelkindError.

Add two missing cases to ATWrongRelkindError.

This way, we produce a better error message if someone tries to do
something like ALTER INDEX .. ALTER COLUMN .. SET STORAGE.

Amit Langote

Branch
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REL9_5_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/17b07afae341c05f2dae1b6c588df6b267e699f2

Modified Files
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src/backend/commands/tablecmds.c |    6 ++++++
1 file changed, 6 insertions(+)