Signed-off-by: Jens Georg <mail@jensge.org>

https://bugzilla.gnome.org/show_bug.cgi?id=705522

https://bugzilla.gnome.org/show_bug.cgi?id=719377

https://bugzilla.gnome.org/show_bug.cgi?id=695990

Now that with 50a5e4 we drop the unused DLNA XML namespace, the reference data
was invalid.

https://bugzilla.gnome.org/show_bug.cgi?id=702557

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=705564

https://bugzilla.gnome.org/show_bug.cgi?id=706928

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=707495

https://bugzilla.gnome.org/show_bug.cgi?id=706926

0 is a valid value for the property upnp:totalDeletedChildCount.
Return -1 instead of 0 when the property is not found.

Same behavior as res@updateCount.

https://bugzilla.gnome.org/show_bug.cgi?id=696837

https://bugzilla.gnome.org/show_bug.cgi?id=698008

Was missing due to varargs. Also needs manual binding instead of just
unhiding because it throws.

gupnp-protocol-info.c: In function 'parse_additional_info':
gupnp-protocol-info.c:72:35: warning: variable 'priv' set but not used [-Wunused-but-set-variable]

gupnp-didl-lite-writer.c: In function 'gupnp_didl_lite_writer_add_container_child_item':
gupnp-didl-lite-writer.c:548:22: warning: unused variable 'doc' [-Wunused-variable]

This was introduced when the method was added in commit 71e46f7d
"Add child item on container in DIDLWriter"

Thanks for taking care of this project!

While copied from the spec, there's a case mixup in them.