Error?

[MaratKhabibullin]

Seems like in backward stage sign of inputDiffBlobs[1] must be negative.

neoml/NeoML/src/Dnn/Layers/EltwiseLayer.cpp

Lines 131 to 137 in 7b76536

	void CEltwiseSubLayer::BackwardOnce()
	{
	for( int i = 0; i < inputDiffBlobs.Size(); ++i ) {
	MathEngine().VectorCopy( inputDiffBlobs[i]->GetData(), outputDiffBlobs[0]->GetData(),
	inputDiffBlobs[i]->GetDataSize() );
	}
	}