bug#14520: 24.3; minibuffer resizes when message contains bold or italic text

[martin rudalics]

> When a message contains bold or italic text, the minibuffer is resized
> incorrectly. E.g.  consider the following two commands:
[...]
> eldoc's tips become distracting as this causes random flickering of the
> minibuffer while moving the cursor through code.
>
> The problem is reproducible at least in all emacs-24.x-bin-i386.zip
> releases on http://ftp.gnu.org/gnu/emacs/windows/
>
> The problem is not reproducible in the Cygwin version
> GNU Emacs 24.3.1 (i686-pc-cygwin, GTK+ Version 3.4.4) of 2013-04-26

See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6192

martin