libgupnp-dlna: changes in function signatures.
libgupnp-dlna: changes in function signatures.

This changes the function signatures of processing
functions in gupnp-dlna-load.c, which now take the
GUPnPDLNALoadState as an argument.

GNOME/gupnp-dlna,luisbg/gupnp-dlna,luisbg/gupnp-dlna,GNOME/gupnp-dlna,GNOME/gupnp-dlna