message: fixed memory leak in Volume class
diff: @@ -143,6 +143,8 @@ void Volume::handleParams()
  vklNewData(vklBlockData.size(), VKL_DATA, vklBlockData.data());
  vklSetData(vklVolume, param.name.c_str(), vklData);
  vklRelease(vklData);
  + for (VKLData vd: vklBlockData)
  + vklRelease(vd);
  if (vklType == "vdb" && param.name == "node.data") {
  // deduce format
  