[UMPNPMGR]

- It is not an error when the client is already connected
- Fixes random driver installation failures

svn path=/trunk/; revision=59142

reactos/base/services/umpnpmgr/umpnpmgr.c

@@ -2885,10 +2885,13 @@ InstallDevice(PCWSTR DeviceInstance, BOOL ShowWizard)
 
     /* Wait for the function to connect to our pipe */
     if(!ConnectNamedPipe(hPipe, NULL))
+    {
+        if (GetLastError() != ERROR_PIPE_CONNECTED)
         {
             DPRINT1("ConnectNamedPipe failed with error %u\n", GetLastError());
             goto cleanup;
         }
+    }
 
     /* Pass the data. The following output is partly compatible to Windows XP SP2 (researched using a modified newdev.dll to log this stuff) */
     wcscpy(InstallEventName, L"Global\\PNP_Device_Install_Event_0.");