Disable the serial debug output if the com port doesn't exist.

Modified: trunk/reactos/ntoskrnl/kd/kdio.c

--- trunk/reactos/ntoskrnl/kd/kdio.c	2005-10-02 08:40:49 UTC (rev 18205)
+++ trunk/reactos/ntoskrnl/kd/kdio.c	2005-10-02 09:42:12 UTC (rev 18206)
@@ -171,7 +171,11 @@

         DispatchTable->KdpPrintRoutine = KdpSerialDebugPrint;
 
         /* Initialize the Port */

-        KdPortInitializeEx(&SerialPortInfo, 0, 0);

+        if (!KdPortInitializeEx(&SerialPortInfo, 0, 0))
+        {
+            KdpDebugMode.Serial = FALSE;
+            return;
+        }

 
         /* Register as a Provider */
         InsertTailList(&KdProviders, &DispatchTable->KdProvidersList);