Fix crash while parsing PE Rich header #1147

Job	Run time
macosx-build	1s
macosx-build	1s
mingw-build (--host=x86_64-w64-mingw32)	1m 37s
mingw-build (--host=x86_64-w64-mingw32)	1m 37s
bazel-build	3m 54s
bazel-build	3m 54s
mingw-build (--host=i686-w64-mingw32)	1m 20s
mingw-build (--host=i686-w64-mingw32)	1m 20s
bigendian	11m 42s
bigendian	11m 42s
standard-build (--enable-debug --enable-cuckoo --enable-magic --enable-macho --enable-pb-tests --...	2m 21s
standard-build (--enable-debug --enable-cuckoo --enable-magic --enable-macho --enable-pb-tests --...	2m 21s
standard-build (--enable-debug --enable-profiling --enable-cuckoo --enable-magic --enable-macho -...	2m 30s
standard-build (--enable-debug --enable-profiling --enable-cuckoo --enable-magic --enable-macho -...	2m 30s
	46m 50s

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