av_free and friends are used in the ffmpeg plugin, and after r13528
ffmpeg's .pc files do not tell anymore to link needlessly to its
private library requirements.
Signed-off-by: Rémi Denis-Courmont <rem@videolan.org>

Including it after stdbool will cause compile failures as pointed by
Mike Frysinger in https://bugs.gentoo.org/show_bug.cgi?id=224289Signed-off-by: Rémi Denis-Courmont <rem@videolan.org>

Note: We may want to check that at configure time.

 in msg_Dbg.

This reverts commit 9ca4d542 which
introduces a segfault.

filter was opened). (CID 110)

objects: Don't lock parent in vlc_object_attach(). It creates quite hard to resolve dead lock, and hopefully it is safe enough not to lock here. We only risk receiving kill event twice. But given current API it is ok.