Qt: Ensure system is shut down before closing

Fixes crash on shutdown on Mac.

src/duckstation-nogui/nogui_host.cpp

@@ -981,11 +981,11 @@ std::optional<WindowInfo> Host::GetTopLevelWindowInfo()
   return g_nogui_window->GetPlatformWindowInfo();
 }
 
-void Host::RequestExit(bool save_state_if_running)
+void Host::RequestExit(bool allow_confirm)
 {
   if (System::IsValid())
   {
-    Host::RunOnCPUThread([save_state_if_running]() { System::ShutdownSystem(save_state_if_running); });
+    Host::RunOnCPUThread([]() { System::ShutdownSystem(g_settings.save_state_on_exit); });
   }
 
   // clear the running flag, this'll break out of the main CPU loop once the VM is shutdown.
@@ -1022,7 +1022,7 @@ static void SignalHandler(int signal)
   {
     std::fprintf(stderr, "Received CTRL+C, attempting graceful shutdown. Press CTRL+C again to force.\n");
     graceful_shutdown_attempted = true;
-    Host::RequestExit(true);
+    Host::RequestExit(false);
     return;
   }
 

src/duckstation-nogui/wayland_nogui_platform.cpp

@@ -270,7 +270,7 @@ void WaylandNoGUIPlatform::TopLevelConfigure(void* data, struct xdg_toplevel* xd
 
 void WaylandNoGUIPlatform::TopLevelClose(void* data, struct xdg_toplevel* xdg_toplevel)
 {
-  Host::RunOnCPUThread([]() { Host::RequestExit(g_settings.save_state_on_exit); });
+  Host::RunOnCPUThread([]() { Host::RequestExit(false); });
 }
 
 void WaylandNoGUIPlatform::SeatCapabilities(void* data, wl_seat* seat, uint32_t capabilities)

src/duckstation-nogui/win32_nogui_platform.cpp

@@ -399,7 +399,8 @@ LRESULT CALLBACK Win32NoGUIPlatform::WndProc(HWND hwnd, UINT msg, WPARAM wParam,
     case WM_CLOSE:
     case WM_QUIT:
     {
-      Host::RunOnCPUThread([]() { Host::RequestExit(g_settings.save_state_on_exit); });
+      Host::RunOnCPUThread([]() { Host::RequestExit(false); });
+      return 0;
     }
     break;
 

src/duckstation-nogui/x11_nogui_platform.cpp

@@ -233,7 +233,7 @@ void X11NoGUIPlatform::ProcessXEvents()
       case ClientMessage:
       {
         if (static_cast<Atom>(event.xclient.data.l[0]) == XInternAtom(m_display, "WM_DELETE_WINDOW", False))
-          Host::RequestExit(true);
+          Host::RequestExit(false);
       }
       break;