Fix crashes related to dispatching messages from netcode

The dispatcher may or may not be ready when these things happen. If it
isn't... KABOOOOOOOOM

Sources/Plasma/PubUtilLib/plNetClient/plNetClientCommInterface.cpp

@@ -65,6 +65,7 @@ int plNetClientCommMsgHandler::HandleMessage( plNetMessage* msg )
 int plNetClientMgr::IInitNetClientComm()
 {
     NetCommActivatePostInitErrorHandler();
+    NetCommActivateMsgDispatchers();
 
     ASSERT(!GetFlagsBit(kNetClientCommInited));
     fNetClientComm.SetDefaultHandler(&fNetClientCommMsgHandler);

Sources/Plasma/PubUtilLib/plNetClientComm/plNetClientComm.cpp

@@ -741,10 +741,6 @@ void NetCommStartup () {
 
     NetClientInitialize();
     NetClientSetErrorHandler(IPreInitNetErrorCallback);
-    NetCliGameSetRecvBufferHandler(INetBufferCallback);
-//    NetCliAuthSetRecvBufferHandler(INetBufferCallback);
-    NetCliAuthSetNotifyNewBuildHandler(INotifyNewBuildCallback);
-    NetCliAuthSetConnectCallback(INotifyAuthConnectedCallback);
 
     // Set startup age info
     memset(&s_startupAge, 0, sizeof(s_startupAge));
@@ -780,22 +776,26 @@ void NetCommEnableNet (
     bool            enabled,
     bool            wait
 ) {
-    if (enabled) {
+    if (enabled)
         NetClientInitialize();
-        NetClientSetErrorHandler(INetErrorCallback);
+    else
-        NetCliGameSetRecvBufferHandler(INetBufferCallback);
-//      NetCliAuthSetRecvBufferHandler(INetBufferCallback);
-    }
-    else {
         NetClientDestroy(wait);
 }
-}
 
 //============================================================================
 void NetCommActivatePostInitErrorHandler () {
     NetClientSetErrorHandler(INetErrorCallback);
 }
 
+//============================================================================
+void NetCommActivateMsgDispatchers() {
+    NetClientSetErrorHandler(INetErrorCallback);
+    NetCliGameSetRecvBufferHandler(INetBufferCallback);
+//  NetCliAuthSetRecvBufferHandler(INetBufferCallback);
+    NetCliAuthSetNotifyNewBuildHandler(INotifyNewBuildCallback);
+    NetCliAuthSetConnectCallback(INotifyAuthConnectedCallback);
+}
+
 //============================================================================
 void NetCommUpdate () {
     // plClient likes to recursively call us on occasion; debounce that crap.

Sources/Plasma/PubUtilLib/plNetClientComm/plNetClientComm.h

@@ -136,6 +136,7 @@ void NetCommEnableNet (
     bool            wait
 );
 void NetCommActivatePostInitErrorHandler();
+void NetCommActivateMsgDispatchers();
 
 
 /*****************************************************************************