OSV-2025-809 Use-of-uninitialized-value in WebPCleanupTransparentArea

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=449246999 Crash type: Use-of-uninitialized-value Crash state: WebPCleanupTransparentArea WebPEncode EncTest...