ofz-8798: Undefined-shift in JBIG2MMRDecoder::get2DCode

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8798
6 jobs for ofz-8798 in 5 minutes and 12 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #90222
build

00:02:51

passed #90227
build_android

00:01:00

passed #90223
build_clang_libcpp

00:04:12

passed #90226
build_clazy

00:05:12

passed #90224
build_gcc_49

00:03:03

passed #90225
build_mingw64_fedora

00:03:30