message: Fix sg::generators on Windows
diff: @@ -51,7 +51,7 @@ namespace ospray {
  using string_pair = std::pair<std::string, std::string>;
  #define OSPSG_REGISTER_GENERATE_FUNCTION(function, name) \
  - extern "C" void ospray_sg_generate_##name( \
  + extern "C" OSPRAY_DLLEXPORT void ospray_sg_generate_##name( \
  std::shared_ptr<Node> world, \
  const std::vector<string_pair> &params) \
  { \
  