bug#16013: 24.3.50; Rows in height is interpreted as pixels.

[martin rudalics]

> Toolkit         Initial frame    Subsequent frame
> -------------------------------------------
> Gtk+ 2/Gtk+ 3     50/80              50/80
> Gnustep           50/80              49/80
> Lucid             50/80              53/80  (Toolbar 3 lines).
> Motif             50/80              53/80  (Toolbar 3 lines).
> No toolkit        50/80              53/80  (Toolbar 3 lines, menu bar
> is 1)
>
> Columns are correct in all cases so that is progress.
> Rows correct only for Gtk.
> Values for Lucid/Motif is with toolbar, i.e. there are 47 lines
> excluding toolbar for Lucid/Motif on initial fra,e. Ditto for no toolkit
> + 1 menu bar line.
>
>
> Looks like toolbar is counted on initial frame, but not on subsequent
> frames for Lucid/Motif/No toolkit.

I'm still too silly to understand.  Should the initial frame have 53
rows (maybe 54 for the non-toolkit version) or should the subsequent
frames all have 50 rows?

I frequently asked on this list what `frame-height' and especially the
"number of lines available for display" stands for, but never got an
answer I could understand.

martin