take the left, right, top and bottom attach arguments as mandatory and

Sat Oct 10 03:37:50 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtktable.c (gtk_table_set_child_arg): take the left, right, top
        and bottom attach arguments as mandatory and readjust the table size
        and opposing edge accordingly if required. this way the order in which
        the arguments are set doesn't matter.