yamlcpp: Explicitly include <cstdint>

Alexander Puck Neuwirthrequested to merge
APN-Pucky/rivet:APN-Pucky-release-4-0-x-patch-24871 into release-4-0-x

See-also: https://gcc.gnu.org/pipermail/gcc-cvs/2024-August/407124.html

See-also: https://bugs.gentoo.org/946280

Similar to LHAPDF:

See-also: lhapdf!96 (merged)

See-also: lhapdf@840a73cc

If the 3.X.Y version of rivet is still getting updates this maybe should be also added there.

Cheers, APN

Edited by Alexander Puck Neuwirth

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