OSV-2025-858 Use-of-uninitialized-value in pcpp::byteArrayToHexString

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=454944849 Crash type: Use-of-uninitialized-value Crash state: pcpp::byteArrayToHexString pcpp::PacketTrailerLayer::toString FuzzTarget.cpp...