Fixes: #2574 when saving a windows workstations the uid is not stored

samba/admin/systems/samba/class_winstationGeneric.inc

@@ -179,7 +179,7 @@ class winstationGeneric extends simplePlugin
   function save_object()
   {
     parent::save_object();
-    $this->uid = $this->cn;
+    $this->attributesAccess['uid']->setValue($this->attributesAccess['cn']->getValue());
   }
 
   function resetCopyInfos()
@@ -225,7 +225,7 @@ class winstationGeneric extends simplePlugin
 
   function prepare_save()
   {
-    $this->uid = $this->cn;
+    $this->attributesAccess['uid']->setValue($this->attributesAccess['cn']->getValue());
     parent::prepare_save();
 
     //verify that the $this->sambaSID exist and that it is correct
@@ -265,7 +265,7 @@ class winstationGeneric extends simplePlugin
 
   function compute_dn()
   {
-    $this->uid = $this->cn;
+    $this->attributesAccess['uid']->setValue($this->attributesAccess['cn']->getValue());
     return 'uid='.$this->uid.','.get_winstations_ou().$this->base;
   }
 }