On error, properly exit from Impress RemoteServer::getClients

Looks like the actual return was missing in front of the empty
vector.

Change-Id: I0ccf0be53ef54138a3ebffab7b09b93b8c629aa0

sd/source/ui/remotecontrol/Server.cxx

@@ -206,10 +206,11 @@ void RemoteServer::removeCommunicator( Communicator* mCommunicator )
 
 std::vector<ClientInfo*> RemoteServer::getClients()
 {
+    std::vector<ClientInfo*> aClients;
     if ( !spServer )
-        std::vector<ClientInfo*>();
+        return aClients;
+
     MutexGuard aGuard( spServer->mDataMutex );
-    std::vector<ClientInfo*> aClients;
     aClients.assign( spServer->mAvailableClients.begin(),
                      spServer->mAvailableClients.end() );
     return aClients;