Fix broken state when attempting to escape a locker while cuffed (#42313)

Check that the DoAfter starts successfully instead of just assuming it does.

Content.Server/Resist/ResistLockerSystem.cs

@@ -57,9 +57,12 @@ public sealed class ResistLockerSystem : EntitySystem
             NeedHand = false, //No hands 'cause we be kickin'
         };
 
+        // Make sure the do after is able to start
+        if (!_doAfterSystem.TryStartDoAfter(doAfterEventArgs))
+            return;
+
         resistLockerComponent.IsResisting = true;
         _popupSystem.PopupEntity(Loc.GetString("resist-locker-component-start-resisting"), user, user, PopupType.Large);
-        _doAfterSystem.TryStartDoAfter(doAfterEventArgs);
     }
 
     private void OnDoAfter(EntityUid uid, ResistLockerComponent component, DoAfterEvent args)