AZL-44688 CVE-2020-15503 affecting package LibRaw for versions less than 0.19.5-5

LibRaw before 0.20-RC1 lacks a thumbnail size range check. This affects decoders/unpackthumb.cpp, postprocessing/memimage.cpp, and utils/thumbutils.cpp. For example, mallocsizeoflibrawprocessedimaget+T.tlength occurs without validating T.tlength...