message: Fix UNorm/SNorm post-processing on mesh data decode
diff: @@ -177,12 +177,14 @@ def unpack_data(fmt: rd.ResourceFormat, data: bytes, data_offset: int):
  # If the format needs post-processing such as normalisation, do that now
  if fmt.compType == rd.CompType.UNorm:
  - divisor = float((1 << fmt.compByteWidth) - 1)
  - value = tuple(float(value[i]) / divisor for i in value)
  + divisor = float((1 << (fmt.compByteWidth*8)) - 1)
  + value = tuple(float(i) / divisor for i in value)
  elif fmt.compType == rd.CompType.SNorm:
  - max_neg = -(1 << (fmt.compByteWidth - 1))
  - divisor = float(-(max_neg-1))
  - value = tuple((float(value[i]) if (value[i] == max_neg) else (float(value[i]) / divisor)) for i in value)
  + max_neg = -(1 << (fmt.compByteWidth*8 - 1))
  + divisor = -float(max_neg+1)
  + value = tuple(-1.0 if (i == max_neg) else float(i / divisor) for i in value)
  + elif fmt.compType == rd.CompType.UScaled or fmt.compType == rd.CompType.SScaled:
  + value = tuple(float(i) for i in value)
  # If the format is BGRA, swap the two components
  if fmt.BGRAOrder():
  