make maximum digits compile time configurable via MAX_DIGITS and up to 20.

make maximum digits compile time configurable via MAX_DIGITS and up to 20.

Wed Jun 20 05:32:05 2001  Tim Janik  <timj@gtk.org>

        * gtk/gtkspinbutton.c: make maximum digits compile time configurable
        via MAX_DIGITS and up to 20. 5 was just ridiculously small.
        don't use automatic fixed size buffer for printf-ing floats, doubles
        can expand to really _huge_ strings, use g_strdup_printf() instead.