message: fix display of active shader in matdbg
  the database of variant was stored in hex, but the list of active
  variant was sent in decimal
diff: @@ -241,11 +241,13 @@ bool JsonWriter::writeActiveInfo(const filaflat::ChunkContainer& package,
  return false;
  }
  json << "\"";
  + json << std::hex;
  for (size_t variant = 0; variant < activeVariants.size(); variant++) {
  if (activeVariants[variant]) {
  json << ", " << variant;
  }
  }
  + json << std::dec;
  json << "]";
  mJsonString = CString(json.str().c_str());
  return true;
  