fixed a compiling error while defined RTGUI_EVENT_DEBUG

a ')' was missing in rtgui_system.c line 162 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1868 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/rtgui/common/rtgui_system.c

@@ -159,7 +159,7 @@ static void rtgui_event_dump(rt_thread_t tid, rtgui_event_t* event)
 				create->extent.x1,
 				create->extent.y1,
 				create->extent.x2,
-				create->extent.y2;
+				create->extent.y2);
 #endif
 		}
 		break;