bug#16923: 24.3.50; reression: `set-frame-size' loses mode line

[Eli Zaretskii]

> Date: Wed, 05 Mar 2014 20:28:47 +0100
> From: martin rudalics <rudalics@gmx.at>
> Cc: 16923@debbugs.gnu.org
> 
> Anyway - the two puzzling aspects are that the mode line apparently gets
> erased (who can do such a thing to the mode line?) while the header line
> remains unharmed.

If someone could post a recipe for reproducing this, perhaps I could
help with answering these questions.