bug#5545: iswitchb assumes bookmark-alist is bound

[Glenn Morris]

In the current trunk, since 2010-02-03:

Compiler warning:

iswitchb.el:1293:19:Warning: reference to free variable `bookmark-alist'

Example:

emacs -Q \
   --eval '(progn (setq iswitchb-use-virtual-buffers t) (iswitchb-mode))'

C-x b 1

-> Error in post-command-hook: (void-variable bookmark-alist)


The documentation of iswitchb-use-virtual-buffers does not mention
searching bookmarks, it only mentions recentf. If it is non-nil, it
activates recentf-mode, but there is no such feature for bookmarks.

Also there is no NEWS entry for this change.