bug#18161: 24.3.92; Crash in do_switch_frame

[martin rudalics]

> Reproduced.  This is X-specific so you don't see a crash on MS-Windows.
> Should be fixed in emacs-24 in r117423.

Thanks Dmitry.  I fixed this for the Windows build and forgot about X.

Can you please mark this so it doesn't get merged to trunk?  There
f->official nil should prevent calling hooks at this stage.

Thanks again, martin