bug#19554: 25.0.50; void-function xref-marker-stack-empty-p and subsequent abort

[martin rudalics <rudalics@gmx.at>]

 > With today's trunk/master and _my init files_ I currently see the
 > following problem.  After coming up with the initial frame and hitting
 > C-x 5 2 I get
 >
 > Debugger entered--Lisp error: (void-function xref-marker-stack-empty-p)
 >    (xref-marker-stack-empty-p)
 >    (not (xref-marker-stack-empty-p))
 >    x-create-frame(((visibility) (bottom-divider-width . 6) (right-divider-width . 6) (horizontal-scroll-bars . t) (tool-bar-lines . 0)))
 >    x-create-frame-with-faces(((bottom-divider-width . 6) (right-divider-width . 6) (horizontal-scroll-bars . t) (cursor-color . "red3") (tool-bar-lines . 0)))
 >    make-frame()
 >    make-frame-command()
 >    funcall-interactively(make-frame-command)
 >    call-interactively(make-frame-command nil nil)
 >    command-execute(make-frame-command)
 >
 > and no frame is created.

This part fixed in commit e946a9a..cc59a3e.  Bug closed.

martin