Fix grammar

abstractlocker.cpp

@@ -51,8 +51,8 @@ void BackgroundWindow::paintEvent(QPaintEvent *)
     if (m_greeterFailure) {
         auto text = ki18n(
             "The screen locker is broken and unlocking is not possible anymore.\n"
-            "In order to unlock it either ConsoleKit or LoginD is needed, none of\n"
-            "which could be found on your system.");
+            "In order to unlock it either ConsoleKit or LoginD is needed, neither\n"
+            "of which could be found on your system.");
         auto text_ck = ki18n(
             "The screen locker is broken and unlocking is not possible anymore.\n"
             "In order to unlock switch to a virtual terminal (e.g. Ctrl+Alt+F%1),\n"