OSV-2020-1502 Use-of-uninitialized-value in void add_residual_fallback<unsigned short>

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22810 Crash type: Use-of-uninitialized-value Crash state: void addresidualfallback void accelerationfunctions::addresidual void scalecoefficientsinternal...