1. Open Emacs.
2. Put it in fullscreen using your window manager command.
3. C-x C-f ~/test.org RET
4. C-c C-e

This triggers an error.

This does not happen with M-x toggle-frame-fullscreen RET.

The attached patch for Org fixes the issue but I guess there
is a more general issue here.

Note that the `fullscreen' frame parameter is fullboth both
with the WM and the Emacs command, so maybe `window-resize'
could check this parameter?