#include <ngspice.h>#include "plotting.h"/* Where 'constants' go when defined on initialization. */struct plot constantplot = {    "Constant values", "Sat Aug 16 10:55:15 PDT 1986", "constants",    "const", NULL, NULL, NULL, NULL, NULL, NULL, TRUE} ;struct plot *plot_cur = &constantplot;struct plot *plot_list = &constantplot;int plotl_changed;      /* TRUE after a load */int plot_num = 1;