message: Prevent an undefined behavior with signed integer overflow in decode.bmp.op.
diff: @@ -108,8 +108,7 @@ class DecodeBmpOp : public OpKernel {
  const int32 abs_height = abs(height);
  // there may be padding bytes when the width is not a multiple of 4 bytes
  - // 8 * channels == bits per pixel
  - const int row_size = (8 * channels_ * width + 31) / 32 * 4;
  + const int row_size = (channels_ * width + 3) / 4 * 4;
  const int64 last_pixel_offset = static_cast<int64>(header_size) +
  (abs_height - 1) * row_size +
  