Adds a check whether provider is registered in sip uri handler.

If not checked, after starting jitsi with parameter and it registers we end up with two calls(to call windows).

src/net/java/sip/communicator/impl/protocol/sip/UriHandlerSipImpl.java

@@ -351,7 +351,11 @@ public void run()
                     // Even if not registered after the timeout, try the call
                     // anyway and the error popup will appear to ask the
                     // user if they want to register
-                    handleUri(uri, provider);
+                    if(provider.getRegistrationState()
+                        != RegistrationState.REGISTERED)
+                    {
+                        handleUri(uri, provider);
+                    }
                 }
             }, initialRegistrationTimeout);
         }