OSV-2026-630 Use-of-uninitialized-value in JXRHandlerPrivate::readTextMeta

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=506459935 Crash type: Use-of-uninitialized-value Crash state: JXRHandlerPrivate::readTextMeta JXRHandlerPrivate::description JXRHandlerPrivate::setMetadata...