Removed zlib from MacDependencies because the version included in OS X works just as well.
Removed zlib from MacDependencies because the version included in OS X works just as well.

svn path=/trunk/libavg/; revision=6871

scotty007/libavg,yyd01245/libavg,hoodie/libavg,hoodie/libavg,libavg/libavg,th3infinity/libavg,hoodie/libavg,hoodie/libavg,scotty007/libavg,scotty007/libavg,scotty007/libavg,libavg/libavg,yyd01245/libavg,th3infinity/libavg,libavg/libavg,libavg/libavg,yyd01245/libavg,th3infinity/libavg,th3infinity/libavg,yyd01245/libavg