fixing a warning the proper way.

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@75 fc73d0e0-1445-4013-8a0c-d673dee63da5

engine/common/sys.h

@@ -68,6 +68,9 @@ void Sys_Sleep (void);
 // called to yield for a little bit so as
 // not to hog cpu when paused or debugging
 
+void Sys_ServerActivity(void);
+//make window flash on the taskbar - someone said something/connected
+
 void Sys_SendKeyEvents (void);
 // Perform Key_Event () callbacks until the input que is empty