Volker Stolz <vs@freebsd.org> contacted me and made me aware that the 'wargus' port statically links to libpng. The following patch should fix this. I've also taken the time out to be nitpicky about the wording in pkg-descr, the comment, the pkg-message and the wrapper script.
Responsible Changed From-To: freebsd-ports-bugs->flz Grab.
State Changed From-To: open->closed Committed. Thanks!