*configure.ac: It was confusing pkg-config on MacOSX

configure.ac

@@ -99,8 +99,8 @@ dnl kludge because only the debian package provides a ffmpeg-config
     OBJCFLAGS_save="${OBJCFLAGS_save} -I${topdir}/extras/contrib/include"
     if test $BUILD = $HOST; then
     	export PKG_CONFIG_PATH=${topdir}/extras/contrib/bin:$PKG_CONFIG_PATH
-    else
-    	export PKG_CONFIG_LIBDIR=${topdir}/extras/contrib/bin
+dnl    else
+dnl    	export PKG_CONFIG_LIBDIR=${topdir}/extras/contrib/bin
     fi
     if test -d ${topdir}/extras/contrib/vlc-lib; then
       LDFLAGS="${LDFLAGS} -L${topdir}/extras/contrib/vlc-lib"