OSV-2022-169 Heap-buffer-overflow in ucasemap_internalUTF8ToTitle_70

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=44779 Crash type: Heap-buffer-overflow READ 1 Crash state: ucasemapinternalUTF8ToTitle70 ucasemapmapUTF8 ucasemaputf8ToTitle70...