OSV-2025-131 Heap-buffer-overflow in vips_foreign_save_heif_write_block

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=396460413 Crash type: Heap-buffer-overflow WRITE Crash state: vipsforeignsaveheifwriteblock wbufferwritethread vipsthreadsetwork...