message: Fix matrix class in opencl test, close
diff: @@ -206,11 +206,11 @@ public:
  assert(data_.size() == num_elements);
  }
  - float& operator()(size_t column, size_t row) {
  + int& operator()(size_t column, size_t row) {
  return data_[column + row * Size];
  }
  - const float& operator()(size_t column, size_t row) const {
  + const int& operator()(size_t column, size_t row) const {
  return data_[column + row * Size];
  }
  