bug#19482: Changing to big font cause display problem

[martin rudalics]

> Open emacs, and run the following code:
> (set-frame-font "Menlo:size=30")
>
> Then text in "*scratch*" buffer disappeared and I can't make the text visible 
> with scrolling up or down.
> After resizing Emacs's window size, text is visible.
>
> It seems that after changing font size Emacs doesn't known the real window size 
> and so can't display
> correctly.

Can you still see this?  If so please tell us which version of Emacs you
use and how you built it.

Thanks, martin