message: promote uint8_t (i.e. uchar) to printable ints
  An easy way to do this is to prepend a "+" to the variable.
diff: @@ -1126,8 +1126,8 @@ void FrameGraph::export_graphviz(utils::io::ostream& out) {
  out << "\n";
  for (ResourceNode const& node : registry) {
  Resource const* subresource = node.resource;
  - out << "\"R" << node.resource->id << "_" << node.version << "\""
  - "[label=\"" << node.resource->name << "\\n(version: " << node.version << ")"
  + out << "\"R" << node.resource->id << "_" << +node.version << "\""
  + "[label=\"" << node.resource->name << "\\n(version: " << +node.version << ")"
  "\\nid:" << node.resource->id <<
  "\\nrefs:" << node.resource->refs << ", texture: " << node.resource->needsTexture <<
  "\", style=filled, fillcolor="
  @@ -1142,7 +1142,7 @@ void FrameGraph::export_graphviz(utils::io::ostream& out) {
  for (auto const& node : frameGraphPasses) {
  out << "P" << node.id << " -> { ";
  for (auto const& writer : node.writes) {
  - out << "R" << registry[writer.index].resource->id << "_" << registry[writer.index].version << " ";
  + out << "R" << registry[writer.index].resource->id << "_" << +registry[writer.index].version << " ";
  }
  out << "} [color=red2]\n";
  }
  @@ -1150,7 +1150,7 @@ void FrameGraph::export_graphviz(utils::io::ostream& out) {
  // connect resources to passes
  out << "\n";
  for (ResourceNode const& node : registry) {
  - out << "R" << node.resource->id << "_" << node.version << " -> { ";
  + out << "R" << node.resource->id << "_" << +node.version << " -> { ";
  // who reads us...
  for (PassNode const& pass : frameGraphPasses) {
  @@ -1168,8 +1168,8 @@ void FrameGraph::export_graphviz(utils::io::ostream& out) {
  if (!mAliases.empty()) {
  out << "\n";
  for (fg::Alias const& alias : mAliases) {
  - out << "R" << registry[alias.from.index].resource->id << "_" << registry[alias.from.index].version << " -> ";
  - out << "R" << registry[alias.to.index].resource->id << "_" << registry[alias.to.index].version;
  + out << "R" << registry[alias.from.index].resource->id << "_" << +registry[alias.from.index].version << " -> ";
  + out << "R" << registry[alias.to.index].resource->id << "_" << +registry[alias.to.index].version;
  out << " [color=yellow, style=dashed]\n";
  }
  }
  