Property definitions

gtk $ GtkAlignment :: new
	new (xalign: Float, yalign: Float, xscale: Float, yscale: Float) `{
		return (GtkAlignment *)gtk_alignment_new(xalign, yalign, xscale, yscale);
	`}
lib/gtk/v3_4/gtk_core.nit:1084,2--1086,3