Sptr: avoided potentially undefined behaviour.archive/overlappingWriteUnion

In src/nxt_unit_sptr.h::nxt_unit_sptr_set() we are setting one member of
a union based on another member which cppcheck[0] flags as undefined
behaviour

src/nxt_unit_sptr.h:27:18: error: Overlapping read/write of union is undefined behavior [overlappingWriteUnion]
    sptr->offset = (uint8_t *) ptr - sptr->base;
                 ^

I think this warning is correct as I can't see where we are setting
sptr->base beforehand which I think would make this defined behaviour.

To avoid any doubts take a copy of sptr->base and then use that value in
the above.

[0]: https://cppcheck.sourceforge.io/

0 files changed, 0 insertions, 0 deletions