[Bug 16659] New: configure doesn't pick up libpng on OpenBSD unless -lz is given

http://bugs.winehq.org/show_bug.cgi?id=16659

Summary: configure doesn't pick up libpng on OpenBSD unless -lz
                    is given
           Product: Wine
           Version: 1.1.11
          Platform: PC
        OS/Version: OpenBSD
            Status: NEW
          Keywords: patch, source
          Severity: major
          Priority: P2
         Component: build-env
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I've already sent a patch for it, see:
http://www.winehq.org/pipermail/wine-patches/2008-December/066784.html

Filing a bug so this doesn't slip through the cracks. Also, easier to
wikify/link to.