steps to reproduce

1. configure emacs to use pgtk

2. emacs -Q

3. C-z or M-x iconify-frame

4. Restore emacs by clicking on its icon

Emacs does not display characters any more.

I believe this bug is similar to bug#42655 except this time it is for pgtk and not lucid.

I believe I have fixed this problem and will attach a patch in the next mail, but the thing is I have no idea how I fixed it so please check for any unintended consequences.

Thanks