reduce UserItem class 72 to 64 bytes using align for 64-bit platforms

Author: GermanAizek

liblightdm-qt/usersmodel.cpp

@@ -29,9 +29,9 @@ class UserItem
     QString session;
     bool isLoggedIn;
     bool hasMessages;
+    bool isLocked;
     quint64 uid;
     QString displayName() const;
-    bool isLocked;
 };
 
 QString UserItem::displayName() const {