Nothing with a real impact, just to silence sanitizers.
From OSS-Fuzz:
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
/src/libfuzzer/FuzzerSHA1.cpp:132:14 in
sec-tabselect.c:58:24: runtime error: negation of 1 cannot be
represented in type 'mp_limb_t' (aka 'unsigned long')
Patch attached.
With Best Regards, Tim