message: simplify: Minor comment clarification
diff: @@ -489,6 +489,7 @@ static void sortEdgeCollapses(unsigned int* sort_order, const Collapse* collapse
  for (size_t i = 0; i < collapse_count; ++i)
  {
  + // skip sign bit since error is non-negative
  unsigned int key = (collapses[i].errorui << 1) >> (32 - sort_bits);
  histogram[key]++;
  