Call app shutdown only if OnExit succeeds

Author: wopss

src/dll/States/ShutdownState.cpp

@@ -54,18 +54,21 @@ bool States::ShutdownState::OnExit(RED4ext::CShutdownState* aThis, RED4ext::CGam
     stateSystem->OnExit(RED4ext::EGameStateType::Shutdown, aApp);
     const bool result = CShutdownState.OnExit(aThis, aApp);
 
-    try
+    if (result)
     {
-        app->Shutdown();
-    }
-    catch (const std::exception& e)
-    {
-        SHOW_MESSAGE_BOX_AND_EXIT_FILE_LINE("An exception occurred while RED4ext was shutting down.\n\n{}",
-                                            Utils::Widen(e.what()));
-    }
-    catch (...)
-    {
-        SHOW_MESSAGE_BOX_AND_EXIT_FILE_LINE("An unknown exception occurred while RED4ext was shutting down.");
+        try
+        {
+            app->Shutdown();
+        }
+        catch (const std::exception& e)
+        {
+            SHOW_MESSAGE_BOX_AND_EXIT_FILE_LINE("An exception occurred while RED4ext was shutting down.\n\n{}",
+                                                Utils::Widen(e.what()));
+        }
+        catch (...)
+        {
+            SHOW_MESSAGE_BOX_AND_EXIT_FILE_LINE("An unknown exception occurred while RED4ext was shutting down.");
+        }
     }
 
     return result;