individual-view: use tp_g_signal_connect_object() to connect the destroy sig
individual-view: use tp_g_signal_connect_object() to connect the destroy sig

This ensure that we won't call the callback when disposing the widget.

https://bugzilla.gnome.org/show_bug.cgi?id=667676

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