OSV-2020-1007 Heap-use-after-free in DetectParseDupSigCompareFunc

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22715 Crash type: Heap-use-after-free READ 4 Crash state: DetectParseDupSigCompareFunc HashListTableLookup DetectEngineSignatureIsDuplicate...