NEW Add an explanation message on shipment page to explain you can't

make shipment if order is not validated

htdocs/expedition/shipment.php

@@ -701,6 +701,12 @@ if ($id > 0 || ! empty($ref))
 
 
         // Bouton expedier avec gestion des stocks
+
+        if (! empty($conf->stock->enabled) && $commande->statut == Commande::STATUS_DRAFT)
+        {
+            print $langs->trans("ValidateOrderFirstBeforeShipment");
+        }
+        
 		if (! empty($conf->stock->enabled) && ($commande->statut > Commande::STATUS_DRAFT && $commande->statut < Commande::STATUS_CLOSED))
 		{
 			if ($user->rights->expedition->creer)

htdocs/langs/en_US/sendings.lang

@@ -71,6 +71,7 @@ ProductQtyInShipmentAlreadySent=Product quantity from opened customer order alre
 ProductQtyInSuppliersShipmentAlreadyRecevied=Product quantity from opened supplier order already received
 NoProductToShipFoundIntoStock=No product to ship found into warehouse <b>%s</b>. Correct stock or go back to choose another warehouse. 
 WeightVolShort=Weight/Vol.
+ValidateOrderFirstBeforeShipment=You must first validate the order before being able to make shipments.
 
 # Sending methods
 SendingMethodCATCH=Catch by customer