message: Fix -Wconversion issue in public header
diff: @@ -81,7 +81,7 @@ namespace KtxUtility {
  Texture* texture = Texture::Builder()
  .width(ktxinfo.pixelWidth)
  .height(ktxinfo.pixelHeight)
  - .levels(nmips)
  + .levels(static_cast<uint8_t>(nmips))
  .sampler(ktx.isCubemap() ? Sampler::SAMPLER_CUBEMAP : Sampler::SAMPLER_2D)
  .rgbm(rgbm)
  .format(texformat)
  