Make 'in' failures on primitives catchable
Make 'in' failures on primitives catchable

Fixes https://github.com/NeilFraser/JS-Interpreter/issues/97

arcatdmz/JS-Interpreter,arcatdmz/JS-Interpreter,NeilFraser/JS-Interpreter,arcatdmz/JS-Interpreter,NeilFraser/JS-Interpreter,NeilFraser/JS-Interpreter