Fix gst-register when compiled with -O and -march=athlon-xp. Also bumping
PORTREVISION as this really didn't stop gstreamer-plugins from installing.

PR: 72993
Reported by: mezz

		roman@cognition.uni-freiburg.de

Submitted by: Michael Johnson <ahze@ahze.net>
Tested by: mezz
Approved by: maintainer (blanket)