use freeglut by default under Windows

Demos/OpenGL/GlutStuff.cpp

@@ -66,7 +66,6 @@ static void glutDisplayCallback(void)
 }
 
 
-
 int glutmain(int argc, char **argv,int width,int height,const char* title,DemoApplication* demoApp) {
     
 	gDemoApplication = demoApp;
@@ -76,7 +75,10 @@ int glutmain(int argc, char **argv,int width,int height,const char* title,DemoAp
     glutInitWindowPosition(0, 0);
     glutInitWindowSize(width, height);
     glutCreateWindow(title);
-	
+#if (defined (WIN32) && defined (_MSC_VER))
+	glutSetOption (GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS);
+#endif
+
     gDemoApplication->myinit();
 
 	glutKeyboardFunc(glutKeyboardCallback);