Fixed compiler warnings.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@7466 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/graphics/particle_kind_manager.cpp

@@ -59,6 +59,7 @@ ParticleKind* ParticleKindManager::getParticles(const char* name)
         }
         catch (std::runtime_error& e)
         {
+            (void)e;  // avoid compiler warning
             return NULL;
         }
     }

src/states_screens/kart_selection.cpp

@@ -338,7 +338,7 @@ public:
         const KartModel &kart_model = props->getMasterKartModel();
         
         m_model_view->addModel( kart_model.getModel(), Vec3(0,0,0), 
-                                kart_model.getBaseFrame() );
+                                (float)kart_model.getBaseFrame() );
         m_model_view->addModel( kart_model.getWheelModel(0), 
                                 kart_model.getWheelGraphicsPosition(0) );
         m_model_view->addModel( kart_model.getWheelModel(1),