wavpack: Use of uninitialized variable in WavpackSetConfiguration64 leads to DoS

WavpackSetConfiguration64 in packutils.c in libwavpack.a in WavPack through 5.1.0 has a "Conditional jump or move depends on uninitialised value" condition, which might allow attackers to cause a denial of service application crash via a DFF file that lacks valid sample-rate data...