Change connection listen method to return a boolean indicating whether the socket began to listen successfully. TODO: Use this value usefully.

git-svn-id: svn+ssh://oldsvn/home/mlalondesvn/svn/cral@109 3ee9b42a-b53c-0410-a25e-f0b6218d5d5b

branches/follower/wiz810mj/src/demo/WizDemo4/WizDemo4.pde

@@ -225,7 +225,7 @@ class NetworkConnection { // Essentially a Socket wrapper
   public:
     NetworkConnection(uint16_t port); // TODO: Add UDP, TCP choice?
 
-    void listen(); // TODO: Return a useful value?
+    int listen();
     int isConnected();
     byte read();
     void NetworkConnection::close();
@@ -243,11 +243,11 @@ NetworkConnection::NetworkConnection(uint16_t port) {
   socket(_socket, Sn_MR_TCP, port, 0);
 }
 
-void NetworkConnection::listen() { // TODO: Make private or protected?
+int NetworkConnection::listen() { // TODO: Make private or protected?
   /*
 
    */  
-  ::listen(_socket); // TODO: Use C++ namespaces for the driver functions?
+  return !!::listen(_socket); // TODO: Use C++ namespaces for the driver functions?
 }
 
 byte NetworkConnection::read() {