Is a return, a break or a continue executed?

Set this mark to skip the evaluation until a labeled statement catch it with is_escape

Property definitions

nitc $ NaiveInterpreter :: escapemark
	# Is a return, a break or a continue executed?
	# Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
	var escapemark: nullable EscapeMark = null
src/interpreter/naive_interpreter.nit:129,2--131,43