Add sanity checks to GUPnPServiceProxyAction API
Add sanity checks to GUPnPServiceProxyAction API

Check that a GUPnPServiceProxyAction is used with the
GUPnPServiceProxy object that it was created for.

GNOME/gupnp,GNOME/gupnp,GNOME/gupnp,GNOME/gupnp