OSV-2023-307 Heap-buffer-overflow in bit_read_BB

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=57911 Crash type: Heap-buffer-overflow READ 1 Crash state: bitreadBB dwgdecodeentity dwgdecodeOLE2FRAMEprivate...