memory error with lop4 in nnvc-11

==4117866== Invalid read of size 2
==4117866==    at 0x456681: extractOutputsDCT<short int> (NNFilterUnified.cpp:454)
==4117866==    by 0x456681: NNFilterUnified::filterBlock(Picture&, UnitArea, int, int, int, int, int, bool) (NNFilterUnified.cpp:720)
==4117866==    by 0x458AC1: NNFilterUnified::filter(Picture&, bool, bool) (NNFilterUnified.cpp:842)

This one is likely due to lop4 new output.