update mini2440 bsp

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1225 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/mini2440/touch.c

@@ -83,7 +83,7 @@ struct s3c2410ts
 
 	char phys[32];
 };
-static struct s3c2410ts ts = RT_NULL;
+static struct s3c2410ts ts;
 
 struct rtgui_touch_device
 {