Fix: uniformize code

htdocs/comm/propal/class/propal.class.php

@@ -2479,8 +2479,10 @@ class PropaleLigne
 			$this->special_code		= $objp->special_code;
 			$this->rang				= $objp->rang;
 
-			$this->ref				= $objp->product_ref;
-			$this->libelle			= $objp->product_libelle;
+			$this->ref				= $objp->product_ref;      // deprecated
+            $this->product_ref		= $objp->product_ref;
+            $this->libelle			= $objp->product_libelle;  // deprecated
+            $this->product_label	= $objp->product_libelle;
 			$this->product_desc		= $objp->product_desc;
 
 			$this->db->free($result);