Harden lock against rare race condition that caused two password prompts to appear

Provide alternate secure dialog text string when username cannot be obtained

kdesktop/lock/lockprocess.cc

@@ -1542,6 +1542,7 @@ void LockProcess::displayLockDialogIfNeeded()
 				mBusy = true;
 				if (mLocked) {
 					if (checkPass()) {
+						trinity_desktop_lock_closing_windows = true;
 						stopSaver();
 						kapp->quit();
 					}
@@ -1882,6 +1883,7 @@ bool LockProcess::x11Event(XEvent *event)
             else {
                 if (!mLocked || checkPass())
                 {
+                    trinity_desktop_lock_closing_windows = true;
                     stopSaver();
                     kapp->quit();
                 }

kdesktop/lock/securedlg.cc

@@ -91,7 +91,12 @@ SecureDlg::SecureDlg(LockProcess *parent)
     if (userString == "") {
         userString = user.loginName();
     }
-    mLogonStatus->setText(i18n("'%1' is currently logged on").arg( user.fullName() ));
+    if (userString != "") {
+        mLogonStatus->setText(i18n("'%1' is currently logged on").arg( user.fullName() ));
+    }
+    else {
+        mLogonStatus->setText(i18n("You are currently logged on"));	// We should never get here, and this message is somewhat obtuse, but it is better than displaying two qotation marks with no text between them...
+    }
 
     KSeparator *sep = new KSeparator( KSeparator::HLine, frame );