OSV-2024-1054 Bad-cast to Assimp::LogStream from invalid vptr

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42538150 Crash type: Bad-cast Crash state: Bad-cast to Assimp::LogStream from invalid vptr CallbackToLogRedirector Assimp::DefaultLogger::WriteToStreams...