[Bug c++/96003] [11 Regression] spurious -Wnonnull calling a member on the result of static_cast

[sbergman at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96003

--- Comment #13 from Stephan Bergmann <sbergman at redhat dot com> ---
FTR, with that second patch building recent LibreOffice succeeds without false
positives.