for the strucure).

deallocated).

Indeed, giving a NULL to var_Change(VLC_VAR_SETSTRING) will lead to a crash the
next time this variable is used.

There are still bugs. At least posx, posy, pos and b_need_update are not
protected properly, but I don't have time.

A corner case occured if the mask were changed during initialization.

Close #2573

As advised on the forum, !/ is the standard separator for JAR protocol.

Report : http://forum.videolan.org/viewtopic.php?f=13&t=59425&p=198466#p198450

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>