updated_convs_noutput.lua

function networks.convs_noutput(convs, input_size)
  input_size = input_size or networks.base_input_size
  -- Get the number of channels for conv that are multiscale or not
  local nbr_input_channels = convs[1]:get(1).nInputPlane or
                             convs[1]:get(1):get(1).nInputPlane
  local output = torch.Tensor(1, nbr_input_channels, input_size, input_size)
  for _, conv in ipairs(convs) do
    output = conv:forward(output)
  end
  return output:nElement(), output:size(3)
end