message: fix: avoid integer underflow
diff: @@ -56,7 +56,7 @@ pub fn seedAlignment(
  if bandWidth < (2 * params.seedLength) {
  return Ok(SeedAlignmentResult {
  - meanShift: ((refSize - querySize) as f32 * 0.5).round() as i32,
  + meanShift: ((refSize as f32 - querySize as f32) * 0.5).round() as i32,
  bandWidth,
  });
  };
  