Do not print std::string through Interpreter.
Do not print std::string through Interpreter.

Increases performance for all printValue() calls that do go through the Interpreter.

marsupial/cling,marsupial/cling,karies/cling,karies/cling,marsupial/cling,karies/cling,root-mirror/cling,karies/cling,root-mirror/cling,root-mirror/cling,karies/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,marsupial/cling,karies/cling,marsupial/cling,root-mirror/cling