OSV-2024-955 Use-of-uninitialized-value in pcpp::IPv6Address::toString

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42536479 Crash type: Use-of-uninitialized-value Crash state: pcpp::IPv6Address::toString pcpp::NDPNeighborSolicitationLayer::toString pcpp::Packet::toStringList...