(Feel free to move/cleanup)

In streams that do not have SPU ES setting spu-es to zero using libvlc_video_set_spu() results in playback being stopped. This is unwanted behaviour against which this patch protects now.

Fixes play/pause and fullscreen toggle.

Original rewrite done by JP Dinger <jpd@m2x.nl> and cleaned up by jpsaman.

Review: Removed debug leftovers that where #if'ed and reverted none exiting p_plugin->getMP() changes.
Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

Add --no-plugins-cache when compiling the mozilla plugin with debugging enabled, and simplify --volume=0 when starting muted.
Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

That's clearly a hack but at least it works.