message: Removed unnecessary nullptr guard from MeshReader::MaterialRegistry destructor.
diff: @@ -72,10 +72,8 @@ MeshReader::MaterialRegistry& MeshReader::MaterialRegistry::operator=(const Mate
  }
  // Delete the implementation
  MeshReader::MaterialRegistry::~MaterialRegistry() {
  - if (mImpl != nullptr) {
  delete mImpl;
  }
  -}
  // Default move construction
  MeshReader::MaterialRegistry::MaterialRegistry(MaterialRegistry&& rhs)
  