message: Fix compile error on clang-10
  Not sure why this wasn't flagged earlier - easy fix
diff: @@ -88,7 +88,7 @@ bool CopyPaste::copy()
  // go through the selected atoms and add them
  // make sure to track the new index
  - std::vector atomIndex(m_molecule->atomCount(), 0);
  + std::vector<Index> atomIndex(m_molecule->atomCount(), 0);
  for (Index i = 0; i < m_molecule->atomCount(); ++i)
  if (m_molecule->atomSelected(i)) {
  auto a = copy->addAtom(m_molecule->atomicNumber(i));
  