Send the SDL_QUIT when last window is destroyed, not during its close event.

src/events/SDL_windowevents.c

@@ -197,13 +197,6 @@ SDL_SendWindowEvent(SDL_Window * window, Uint8 windowevent, int data1,
         posted = (SDL_PushEvent(&event) > 0);
     }
 
-    if (windowevent == SDL_WINDOWEVENT_CLOSE) {
-        if ( !window->prev && !window->next ) {
-            /* This is the last window in the list so send the SDL_QUIT event */
-            SDL_SendQuit();
-        }
-    }
-
     return (posted);
 }
 

src/video/SDL_video.c

@@ -2210,6 +2210,11 @@ SDL_DestroyWindow(SDL_Window * window)
     }
 
     SDL_free(window);
+
+    if (_this->windows == NULL) {
+        /* This is the last window in the list so send the SDL_QUIT event */
+        SDL_SendQuit();
+    }
 }
 
 SDL_bool