message: Fractional lookup table height.
  (TFS#901351, TFS#901352)
diff: @@ -36,14 +36,13 @@ export class LUTDimensions {
  }
  // Compute height
  - let height = nRgba / width;
  - if (width * height < nRgba) {
  - ++height;
  - }
  + const height = Math.ceil(nRgba / width);
  assert(height <= maxSize);
  assert(width <= maxSize);
  assert(width * height >= nRgba);
  + assert(Math.floor(height) === height);
  + assert(Math.floor(width) === width);
  // Row padding should never be necessary...
  assert(0 === width % nRgbaPerEntry);
  