Fix memleak in GUI (clap and vst)

Author: brummer10

NeuralRack/clap/NeuralRack.cc

@@ -142,6 +142,10 @@ class NeuralRack
         widget_hide(TopWin);
         firstLoop = false;
     }
+    
+    void quitMain() {
+        main_quit(&ui->main);
+    }
 
     void quitGui() {
         fetch.stop();

NeuralRack/clap/NeuralRackClap.cpp

@@ -284,7 +284,10 @@ static bool neuralrack_gui_create(const clap_plugin *plugin, const char *api, bo
 
 static void neuralrack_gui_destroy(const clap_plugin *plugin) {
     neuralrack_plugin_t *plug = (neuralrack_plugin_t *)plugin->plugin_data;
-    if (plug->guiIsCreated) plug->r->cleanup();
+    if (plug->guiIsCreated) {
+        plug->r->cleanup();
+        plug->r->quitMain();
+        }
     plug->r->quitGui();
     plug->guiIsCreated = false;
 }

NeuralRack/vst2/NeuralRackvst.cpp

@@ -144,7 +144,10 @@ static intptr_t dispatcher(AEffect* effect, int32_t opCode, int32_t index, intpt
             break;
         }
         case effEditClose: {
-            if (plug->guiIsCreated) plug->r->cleanup();
+            if (plug->guiIsCreated) {
+                plug->r->cleanup();
+                plug->r->quitMain();
+            }
             plug->r->quitGui();
             plug->guiIsCreated = false;
             break;