message: Fixed a small error introduced in the last commit.
diff: @@ -51,7 +51,7 @@ TsdfIntegratorBase::Ptr TsdfIntegratorFactory::create(
  TsdfIntegratorBase::TsdfIntegratorBase(const Config& config,
  Layer<TsdfVoxel>* layer)
  : config_(config) {
  - CHECK_NOTNULL(layer_);
  + CHECK_NOTNULL(layer);
  setLayer(layer);
  