now scale with Opts(scale), which is a zoom scalefactor (default 1), and
Opts(toolscale) sets an independent sizing for the toolbar icons, which is
multiplied by the Opts(scale) scalefactor. Also: Added GR_LIBS to the
link options for magicexec and magicdnull, to avoid compile-time problems
on some systems (thank you to Charlene of OpenBSD for the patch!).
Tim Edwards