Allocate and fill a virtual table

Property definitions

nitc $ MemoryManager :: init_vtable
	# Allocate and fill a virtual table
	fun init_vtable(ids: Array[Int], nb_methods: Array[Int], nb_attributes: Array[Int], mask: Int): Pointer
	do
		# Allocate in C current virtual table
		var res = intern_init_vtable(ids, nb_methods, nb_attributes, mask)

		return res
	end
src/vm/virtual_machine.nit:929,2--936,4