message: Fix default pooling layer type
diff: @@ -67,13 +67,14 @@ class PoolingLayerImpl : public PoolingLayer
  public:
  PoolingLayerImpl(const LayerParams& params)
  {
  - type = MAX;
  computeMaxIdx = true;
  globalPooling = false;
  + stride = Size(1, 1);
  - if (params.has("pool"))
  + if (params.has("pool") || params.has("kernel_size") ||
  + params.has("kernel_w") || params.has("kernel_h"))
  {
  - String pool = params.get<String>("pool").toLowerCase();
  + String pool = params.get<String>("pool", "max").toLowerCase();
  if (pool == "max")
  type = MAX;
  else if (pool == "ave")
  @@ -90,6 +91,8 @@ public:
  type = ROI;
  computeMaxIdx = false;
  }
  + else
  + CV_Error(Error::StsBadArg, "Cannot determine pooling type");
  setParamsFrom(params);
  ceilMode = params.get<bool>("ceil_mode", true);
  pooledSize.width = params.get<uint32_t>("pooled_w", 1);
  