This fixes the issues my patch has caused...
1) if I start without existing user config files, it crashes (current
player is NULL)
2) the m_remember_me variable is not used
3) if I understand the code correctly, it sets the current player to a
guest player to indicate that there is no current player atm (which is
then used to start the login window). If this correct, then it would be
better to indicate this by setting the current player to NULL. Reason is
that this way we can easily detect incorrect usage elsewhere (since we
will get a crash, instead of storing data in the guest player, and we
will only later detect that something was not saved as expected).