OSV-2025-989 Bad-cast to UT_hash_bucket' (aka 'struct UT_hash_bucket')password_file__cleanup

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=468922225 Crash type: Bad-cast Crash state: Bad-cast to UThashbucket' aka 'struct UThashbucket'passwordfilecleanup mosquittosecuritycleanupdefault brokerfuzzpasswordfile.cpp...