Soo that we avoid plugin cache problem between binary version.

This patch was first thought for Debian but considering it is usefull
for all distros and for VideoLAN own win32 and MacOSX builds, I
think it has its place in the master tree.

requested one. (Breaking at least mapped file input).

Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

defined from commandline.

Simplicy asf_object_t use.

stream language.

free).
Removed useless memset after calloc.