Remove null pointer support in setComponentHandler

This should be an implementation fault.

src/common/logging/vst3.cpp

@@ -209,13 +209,8 @@ bool Vst3Logger::log_request(
     const YaEditController::SetComponentHandler& request) {
     return log_request_base(is_host_vst, [&](auto& message) {
         message << request.instance_id
-                << ": IEditController::setComponentHandler(handler = ";
-        if (request.component_handler_proxy_args) {
-            message << "<IComponentHandler*>";
-        } else {
-            message << "<nullptr>";
-        }
-        message << ")";
+                << ": IEditController::setComponentHandler(handler = "
+                   "<IComponentHandler*>)";
     });
 }
 

src/common/serialization/vst3/plugin/edit-controller.h

@@ -345,18 +345,12 @@ class YaEditController : public Steinberg::Vst::IEditController {
 
         native_size_t instance_id;
 
-        /**
-         * Arguments for instantiating the proxy object. Even though it should
-         * never happen, if the host passed a null pointer to this function
-         * we'll mimic that as well.
-         */
-        std::optional<Vst3ComponentHandlerProxy::ConstructArgs>
-            component_handler_proxy_args;
+        Vst3ComponentHandlerProxy::ConstructArgs component_handler_proxy_args;
 
         template <typename S>
         void serialize(S& s) {
             s.value8b(instance_id);
-            s.ext(component_handler_proxy_args, bitsery::ext::StdOptional{});
+            s.object(component_handler_proxy_args);
         }
     };