message: Fix bug with not clearing the otherRegions in DistributedModel::commit
  This would result in us thinking there were far more regions
  than there actually are (n commits * n real regions), so when we
  waited for the frame to finish rendering we'd wait forever, expecting
  tiles from regions we double-counted
diff: @@ -46,6 +46,8 @@ namespace ospray {
  void DistributedModel::commit()
  {
  + othersRegions.clear();
  +
  // TODO: We may need to override the ISPC calls made
  // to the Model or customize the model struct on the ISPC
  // side. In which case we need some ISPC side inheritence
  