WaE: virtual dtor warnings

Change-Id: I22b79ed43db2233b5c8edd90092ca387bfd0ca9a

sd/source/ui/remotecontrol/AvahiNetworkService.hxx

@@ -28,7 +28,7 @@ namespace sd {
     public:
         AvahiNetworkService(const std::string& aname = "", uint aport = 1599)
             : ZeroconfService(aname, aport){}
-        ~AvahiNetworkService();
+        virtual ~AvahiNetworkService(){}
 
         void clear();
         void setup();

sd/source/ui/remotecontrol/ZeroconfService.hxx

@@ -28,6 +28,7 @@ namespace sd{
     public:
         explicit ZeroconfService(const std::string& aname, uint aport)
             :name(aname), port(aport){}
+        virtual ~ZeroconfService(){}
 
         std::string getName() const {return name;}
         void setName(const char * n) {name = n;}