CursorForward(screen, n) register TScreen	*screen; int		n;
CursorForward(register TScreen *screen, int n)
CursorForward(screen, n)register TScreen	*screen;int		n;{	screen->cur_col += n;	if (screen->cur_col > screen->max_col)		screen->cur_col = screen->max_col;	screen->do_wrap = 0;	_CheckSelection(screen);}