OS.memset(ptr, 0, 1);
public int getItemHeight () {	checkWidget();	int [] args = new int [] {		OS.Pt_ARG_LIST_TOTAL_HEIGHT, 0, 0,		OS.Pt_ARG_LIST_ITEM_COUNT, 0, 0,		OS.Pt_ARG_LIST_FONT, 0, 0,	};	OS.PtGetResources (handle, args.length / 3, args);	if (args [4] == 0) {		int ptr = OS.malloc(1);		PhRect_t rect = new PhRect_t ();		OS.PfExtentText(rect, null, args [7], ptr, 1);		OS.free(ptr);		int inset = 4;		return inset + (rect.lr_y - rect.ul_y + 1);	}	return args [1] / args [4];}