Don't unlock session on VT switch fail

diff --git a/tdmlib/dmctl.cpp b/tdmlib/dmctl.cpp
index 6ee7722..6fea12b 100644
--- a/tdmlib/dmctl.cpp
+++ b/tdmlib/dmctl.cpp
@@ -401,7 +401,7 @@
 		kapp->dcopClient()->call("kdesktop", "KScreensaverIface", "lock()", data, replyType, replyData);
 		if (!switchVT( vt )) {
 			// Switching VT failed; unlock...
-			kapp->dcopClient()->call("kdesktop", "KScreensaverIface", "unlock()", data, replyType, replyData);
+			// kapp->dcopClient()->call("kdesktop", "KScreensaverIface", "unlock()", data, replyType, replyData);
 		}
 	}
 }