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

[martin rudalics]

> Perhaps Martin meant something other than the redisplay cycle I
> described above.

I had no idea about how Drew triggered the calls or redisplay.  What I
wanted to know was how often he invoked `set-frame-size' before the next
redisplay, and how often he then invoked `set-frame-size' before the
next redisplay, and so on ...  That's what I used the term cycle for.

martin