Properly handle exceptions when saving the game

Add message boxes when an exception occurs while loading or saving the game

apps/openmw/mwstate/statemanagerimp.cpp

@@ -148,6 +148,8 @@ void MWState::StateManager::endGame()
 }
 
 void MWState::StateManager::saveGame (const std::string& description, const Slot *slot)
+{
+    try
     {
         ESM::SavedGame profile;
 
@@ -235,6 +237,18 @@ void MWState::StateManager::saveGame (const std::string& description, const Slot
         Settings::Manager::setString ("character", "Saves",
             slot->mPath.parent_path().filename().string());
     }
+    catch (const std::exception& e)
+    {
+        std::stringstream error;
+        error << "Failed to save game: " << e.what();
+
+        std::cerr << error.str() << std::endl;
+
+        std::vector<std::string> buttons;
+        buttons.push_back("#{sOk}");
+        MWBase::Environment::get().getWindowManager()->messageBox(error.str(), buttons);
+    }
+}
 
 void MWState::StateManager::quickSave (std::string name)
 {
@@ -371,10 +385,17 @@ void MWState::StateManager::loadGame (const Character *character, const Slot *sl
     }
     catch (const std::exception& e)
     {
-        std::cerr << "failed to load saved game: " << e.what() << std::endl;
+        std::stringstream error;
+        error << "Failed to load saved game: " << e.what();
+
+        std::cerr << error.str() << std::endl;
         cleanup (true);
 
         MWBase::Environment::get().getWindowManager()->pushGuiMode (MWGui::GM_MainMenu);
+
+        std::vector<std::string> buttons;
+        buttons.push_back("#{sOk}");
+        MWBase::Environment::get().getWindowManager()->messageBox(error.str(), buttons);
     }
 }