Fix : tva not coming from multiprice

htdocs/compta/facture.php

@@ -1152,6 +1152,8 @@ else if ($action == 'addline' && $user->rights->facture->creer)
 					$pu_ttc = $prod->multiprices_ttc[$object->client->price_level];
 					$price_min = $prod->multiprices_min[$object->client->price_level];
 					$price_base_type = $prod->multiprices_base_type[$object->client->price_level];
+					if (isset($prod->multiprices_tva_tx[$object->client->price_level])) $tva_tx=$prod->multiprices_tva_tx[$object->client->price_level];
+					if (isset($prod->multiprices_recuperableonly[$object->client->price_level])) $tva_npr=$prod->multiprices_recuperableonly[$object->client->price_level];
 				}
 				elseif (! empty($conf->global->PRODUIT_CUSTOMER_PRICES))
 				{