/* get xtic, ticval or -1 */
_gxtic(w)
{
        local tic;

        if (argc < 1)
        {
                if (getxticset) tic = getxtic;
                else tic = -1;
        }
        else
        {
                if (getxticset(w)) tic = getxtic(w);
                else tic = -1;
        }
        return(tic);
}