qt: additional fixes for reentrant shutdown

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -442,13 +442,7 @@ void RendererOpenGL::DrawScreen(const Layout::FramebufferLayout& layout) {
 
     glBindTextureUnit(0, screen_info.display_texture);
 
-    auto anti_aliasing = Settings::values.anti_aliasing.GetValue();
-    if (anti_aliasing > Settings::AntiAliasing::LastAA) {
-        LOG_ERROR(Render_OpenGL, "Invalid antialiasing option selected {}", anti_aliasing);
-        anti_aliasing = Settings::AntiAliasing::None;
-        Settings::values.anti_aliasing.SetValue(anti_aliasing);
-    }
-
+    const auto anti_aliasing = Settings::values.anti_aliasing.GetValue();
     if (anti_aliasing != Settings::AntiAliasing::None) {
         glEnablei(GL_SCISSOR_TEST, 0);
         auto viewport_width = screen_info.texture.width;

src/yuzu/main.cpp

@@ -1839,9 +1839,11 @@ void GMainWindow::OnEmulationStopTimeExpired() {
 
 void GMainWindow::OnEmulationStopped() {
     shutdown_timer.stop();
-    emu_thread->disconnect();
-    emu_thread->wait();
-    emu_thread = nullptr;
+    if (emu_thread) {
+        emu_thread->disconnect();
+        emu_thread->wait();
+        emu_thread.reset();
+    }
 
     if (shutdown_dialog) {
         shutdown_dialog->deleteLater();
@@ -3029,6 +3031,8 @@ void GMainWindow::OnStopGame() {
 
     if (OnShutdownBegin()) {
         OnShutdownBeginDialog();
+    } else {
+        OnEmulationStopped();
     }
 }