bug#5268: 23.1.90; # of rows/columns not adjusted by change of internal-border-width for fullscreen frames

[martin rudalics]

>   1. emacs -Q
>   2. (set-frame-parameter nil 'fullscreen 'fullboth) C-j
>   3. (frame-parameter nil 'width) C-j      [which gives 176 for me]

Gives 156 here.

>   4. (set-frame-parameter nil 'font "-*-courier-*--20-*") C-j
>   5. (frame-parameter nil 'width) C-j      [which gives 112 for me]

Gives 102 here and the frame is still full size.  But if I now do

(set-frame-parameter nil 'font "-*-courier-*--12-*")

the frame is sized down and

(frame-parameter nil 'width)

still evaluates to 102 (after doing that the frame sometimes misses its
modeline, for whatever reason).

With GNU Emacs 23.1.90.1 (i386-mingw-nt5.1.2600) of 2009-12-14 so any
differences we see might be related to our ports.

martin