message: Update assertions in batch norm layer
diff: @@ -32,7 +32,7 @@ public:
  BatchNormLayerImpl(const LayerParams& params)
  {
  setParamsFrom(params);
  - CV_Assert(blobs.size() >= 3);
  + CV_Assert(blobs.size() >= 2);
  hasWeights = params.get<bool>("has_weight", false);
  hasBias = params.get<bool>("has_bias", false);
  @@ -46,8 +46,8 @@ public:
  blobs[0].type() == CV_32F && blobs[1].type() == CV_32F);
  float varMeanScale = 1.f;
  - if (!hasWeights && !hasBias) {
  - CV_Assert(blobs[2].type() == CV_32F);
  + if (!hasWeights && !hasBias && blobs.size() > 2) {
  + CV_Assert(blobs.size() == 3, blobs[2].type() == CV_32F);
  varMeanScale = blobs[2].at<float>(0);
  if (varMeanScale != 0)
  varMeanScale = 1/varMeanScale;
  