Fixed some potential segfaults on emergency shutdown.

es-app/src/views/ViewController.cpp

@@ -227,6 +227,10 @@ void ViewController::invalidAlternativeEmulatorDialog()
 
 void ViewController::goToStart(bool playTransition)
 {
+    // Needed to avoid segfaults during emergency shutdown.
+    if (Renderer::getSDLWindow() == nullptr)
+        return;
+
 #if defined(__APPLE__)
     // The startup animations are very choppy on macOS as of moving to SDL 2.0.18 so the
     // best user experience is to simply disable them on this OS.
@@ -310,6 +314,9 @@ void ViewController::cancelViewTransitions()
 
 void ViewController::stopScrolling()
 {
+    if (Renderer::getSDLWindow() == nullptr)
+        return;
+
     mSystemListView->stopScrolling();
     mCurrentView->stopListScrolling();
 
@@ -1031,6 +1038,9 @@ void ViewController::reloadGameListView(IGameListView* view, bool reloadTheme)
 
 void ViewController::reloadAll()
 {
+    if (Renderer::getSDLWindow() == nullptr)
+        return;
+
     cancelViewTransitions();
 
     // Clear all GameListViews.

es-core/src/Platform.cpp

@@ -11,7 +11,7 @@
 #include "Log.h"
 #include "MameNames.h"
 #include "Settings.h"
-#include "renderers/Renderer.h"
+#include "Window.h"
 #include "utils/StringUtil.h"
 
 #include <SDL2/SDL_events.h>
@@ -270,8 +270,7 @@ void emergencyShutdown()
 {
     LOG(LogError) << "Critical - Performing emergency shutdown...";
 
-    // Most of the SDL deinitialization is done in Renderer.
-    Renderer::deinit();
+    Window::getInstance()->deinit();
     Log::flush();
 
     exit(EXIT_FAILURE);