Fix bug that overworld would remember position when switching player

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@11957 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/race/race_manager.hpp

@@ -682,6 +682,11 @@ public:
         m_kart_last_position_on_overworld = pos;
     }
     // ------------------------------------------------------------------------
+    void clearKartLastPositionOnOverworld()
+    {
+        m_have_kart_last_position_on_overworld = false;
+    }
+    // ------------------------------------------------------------------------
     Vec3 getKartLastPositionOnOverworld()
     { 
         return m_kart_last_position_on_overworld;

src/states_screens/options_screen_players.cpp

@@ -191,6 +191,7 @@ void OptionsScreenPlayers::eventCallback(Widget* widget, const std::string& name
     else if (name == "playername")
     {
         UserConfigParams::m_default_player = L"";
+        race_manager->clearKartLastPositionOnOverworld();
         StateManager::get()->pushScreen(StoryModeLobbyScreen::getInstance());
     }