call-window: add 'inhibit' signal
call-window: add 'inhibit' signal

https://bugzilla.gnome.org/show_bug.cgi?id=684979

GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets