Solaris build fix

[Jonathan Perkin <jonathan perkin org uk>]

Hi,

Sun Studio compiler doesn't like empty structs, for pkgsrc I nabbed
the same patch the OpenSolaris guys used

  http://src.opensolaris.org/source/xref/jds/spec-files/trunk/patches/libsoup-01-empty-struct.diff

It'd be great if this could be incorporated into the next release to
avoid having extra patches.

Thanks!

-- 
Jonathan Perkin                                     The NetBSD Project
http://www.perkin.org.uk/                       http://www.netbsd.org/