OSV-2024-239 Use-of-uninitialized-value in H5G__ent_to_link

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=67794 Crash type: Use-of-uninitialized-value Crash state: H5Genttolink H5Gnodeiterate H5Biteratehelper...