contribs: another bin package update for Mac

fixes ffmpeg linking issues on some setups and includes latest modplug, etc.

extras/contrib/contrib.mak

@@ -49,7 +49,7 @@ src: using-src
 
 ifdef HAVE_DARWIN_OS
 
-CONTRIBREV=47
+CONTRIBREV=48
 
 contrib-macosx-$(ARCH)-$(CONTRIBREV).tar.bz2:
 	$(WGET) http://downloads.videolan.org/pub/videolan/testing/contrib/$@