[Bug other/77421] Bugs found in GCC with the help of PVS-Studio

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77421
Bug 77421 depends on bug 77425, which changed state.

Bug 77425 Summary: Pointer test follows dereference in sched-int.h
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77425

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