message: fix typo in RenderTarget::build attachment size validation
  the validation could fail if attachments used different LODs but the
  sizes still matched.
diff: @@ -97,8 +97,8 @@ RenderTarget* RenderTarget::Builder::build(Engine& engine) {
  uint32_t maxHeight = 0;
  for (auto const& attachment : mImpl->mAttachments) {
  if (attachment.texture) {
  - const uint32_t w = attachment.texture->getWidth(color.mipLevel);
  - const uint32_t h = attachment.texture->getHeight(color.mipLevel);
  + const uint32_t w = attachment.texture->getWidth(attachment.mipLevel);
  + const uint32_t h = attachment.texture->getHeight(attachment.mipLevel);
  minWidth = std::min(minWidth, w);
  minHeight = std::min(minHeight, h);
  maxWidth = std::max(maxWidth, w);
  