CommonHostInterface: Prevent crash with fullscreen UI enabled

src/frontend-common/common_host_interface.cpp

@@ -2702,7 +2702,8 @@ void CommonHostInterface::LoadSettings(SettingsInterface& si)
   }
   else if (m_fullscreen_ui_enabled)
   {
-    FullscreenUI::UpdateSettings();
+    if (FullscreenUI::IsInitialized())
+      FullscreenUI::UpdateSettings();
   }
 
   const bool input_display_enabled = si.GetBoolValue("Display", "ShowInputs", false);

src/frontend-common/fullscreen_ui.cpp

@@ -231,6 +231,11 @@ bool Initialize(CommonHostInterface* host_interface)
   return true;
 }
 
+bool IsInitialized()
+{
+  return (s_host_interface != nullptr);
+}
+
 bool HasActiveWindow()
 {
   return s_current_main_window != MainWindowType::None || s_save_state_selector_open ||

src/frontend-common/fullscreen_ui.h

@@ -40,6 +40,7 @@ enum class SettingsPage
 };
 
 bool Initialize(CommonHostInterface* host_interface);
+bool IsInitialized();
 bool HasActiveWindow();
 void UpdateSettings();
 void SystemCreated();