TCursorForward()
TCursorForward(void)
TCursorForward(){	register TScreen *screen = &term->screen;	register struct Tek_Char *t;	register int l;	if( ( screen->cur_X +=		( t = &TekChar[screen->cur.fontsize])->hsize	    ) > TEKWIDTH	  ) {		if((l = screen->cur_Y / t->vsize - 1) < 0) {			screen->margin = !screen->margin;			l = t->nlines - 1;		}		screen->cur_Y = l * t->vsize;		screen->cur_X = screen->margin == MARGIN1 ? 0 : TEKWIDTH / 2;	}}