setCharset raises an error when using pdo_sqlite

When I attempt to use setCharset("utf8") with pdo_sqlite, this fails.

I know that pdo_sqlite doesn't support SET NAMES utf8, however, this should be caught by the driver (like: throwing a NotSupportedException) or simply ignore setCharset (mainly because if you allow the user to choose their backend, developers don't need to introduce special cases for driver handling).