Correct creation of transcode resource.
Correct creation of transcode resource.

- Re-use the existing resource struct.
- reset different props.

svn path=/trunk/; revision=657

Pelagicore/Media-Manager-Rygel-patched,jku/rygel,jku/rygel,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,GNOME/rygel,Tarnyko/rygel,GNOME/rygel,luisbg/rygel