[Bug c++/99251] [11 Regression] inconsistent -Wnonnull warning behaviour with dynamic_cast

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99251
Bug 99251 depends on bug 74762, which changed state.

Bug 74762 Summary: [9/10/11 Regression] missing uninitialized warning (C++, parenthesized expr, TREE_NO_WARNING)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=74762

           What    |Removed                     |Added
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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED