Oops. Fix my mistakes.

dlls/gamerules.h

@@ -59,7 +59,7 @@ enum
 class CGameRules
 {
 public:
-	virtual ~CGameRules();
+	virtual ~CGameRules(){}
 
 	virtual void RefreshSkillData( void );// fill skill data struct with proper values
 	virtual void Think( void ) = 0;// GR_Think - runs every server frame, should handle any timer tasks, periodic events, etc.