bug#1533: 23.0.60; `apropos-print' doesn't work

[Adrian Robert]

Tracing down a little more, this seems to come down to this call:

(where-is-internal 'menu-bar-select-frame)

Which gives "Key sequence contains invalid event" at line 1392 when c is

#<frame *scratch* 0xaa4bd0>

according to debug_print.  The type is Lisp_Vector.  Commenting out  
the error causes a return from where-is-internal of:

([menu-bar windows #<frame *scratch* 0xaa4bd0>])

Does anyone know if a Lisp_Vector should be allowed here?  The  
function menu-bar-select-frame is defined in ns-win.el for use in the  
Windows (frames) menu.