Is the propdef already analyzed by run_phases_on_npropdef.

Unused unless semantize_is_lazy is true.

Property definitions

nitc :: phase $ APropdef :: _is_phased
	# Is the propdef already analyzed by `run_phases_on_npropdef`.
	# Unused unless `semantize_is_lazy` is true.
	private var is_phased = false
src/phase.nit:188,2--190,30