[ScreenWithMenuElements] Added IsTransitioning() Lua binding (from sm-ssc v2)

src/ScreenWithMenuElements.cpp

@@ -368,11 +368,11 @@ class LunaScreenWithMenuElements: public Luna<ScreenWithMenuElements>
 {
 public:
 	static int Cancel( T* p, lua_State *L )		{ p->Cancel( SM_GoToPrevScreen ); return 0; }
-
+	static int IsTransitioning( T* p, lua_State *L ) { lua_pushboolean( L, p->IsTransitioning() ); return 1; }
 	LunaScreenWithMenuElements()
 	{
   		ADD_METHOD( Cancel );
-	}
+	ADD_METHOD( IsTransitioning );	}
 };
 
 LUA_REGISTER_DERIVED_CLASS( ScreenWithMenuElements, Screen )