Disconnect from signals when the remote AuthSession dies
Disconnect from signals when the remote AuthSession dies

This is an attempt to fix
  http://code.google.com/p/accounts-sso/issues/detail?id=229

How that crash can happen is still rather mysterious, since the code was
apparently doing the right thing and disconnecting from the signals when
destroying the AuthSession.  Still, this change makes the code a little
more robust.

A wrong comment is also removed, along with a couple of variable resets
which shouldn't be there.


Distrotech/libsignon-glib,Distrotech/libsignon-glib,Distrotech/libsignon-glib