Allow to call Application::quit() from plugins

dgl/Application.hpp

@@ -64,7 +64,6 @@ public:
       Quit the application.
       This stops the event-loop and closes all Windows.
       This function is thread-safe.
-      @note This function is meant for standalones only, *never* call this from plugins.
     */
     void quit();
 

dgl/src/Application.cpp

@@ -43,8 +43,6 @@ void Application::exec(const uint idleTimeInMs)
 
 void Application::quit()
 {
-    DISTRHO_SAFE_ASSERT_RETURN(pData->isStandalone,);
-
     pData->quit();
 }
 

dgl/src/ApplicationPrivateData.cpp

@@ -127,8 +127,6 @@ void Application::PrivateData::idle(const uint timeoutInMs)
 
 void Application::PrivateData::quit()
 {
-    DISTRHO_SAFE_ASSERT_RETURN(isStandalone,);
-
     if (! isThisTheMainThread(mainThreadHandle))
     {
         if (! isQuittingInNextCycle)

distrho/src/DistrhoPluginVST2.cpp

@@ -202,6 +202,11 @@ public:
 # endif
     }
 
+    ~UIVst()
+    {
+        fUI.quit();
+    }
+
     // -------------------------------------------------------------------
 
     void idle()

distrho/src/DistrhoUIInternal.hpp

@@ -228,9 +228,7 @@ public:
     void quit()
     {
         uiData->window->close();
-
-        if (uiData->app.isStandalone())
-            uiData->app.quit();
+        uiData->app.quit();
     }
 
     // -------------------------------------------------------------------