For ALTER TABLE RENAME COLUMN, do not try to filter virtual tables out of

For ALTER TABLE RENAME COLUMN, do not try to filter virtual tables out of
calls to sqlite_rename_column().  Let the function filter them itself.
The WHERE clause can mistakenly let virtual tables through if the
sqlite_schema table is corrupt.  The sqlite_rename_column() function must
deal with them.  We might as well let it deal with them always.

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