Revert the last changes to make the number of digits only effect drawing,

Revert the last changes to make the number of digits only effect drawing,

Tue Jan 29 20:38:04 2002  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkscale.[ch]: Revert the last changes to make the
        number of digits only effect drawing, instead, don't
        round unless we are in the 'draw_value' mode -- this
        is the behavior of GTK+-1.2, and keeps the behavior that
        if the user sees a displayed value, it is the correct value.