Merge pull request #7941 from atm-maxime/fix_errmsg_stockneg

Fix display error message when stock not enough on invoice validation #7846

htdocs/compta/facture/class/facture.class.php

@@ -2197,6 +2197,7 @@ class Facture extends CommonInvoice
 							else $result=$mouvP->livraison($user, $this->lines[$i]->fk_product, $idwarehouse, $this->lines[$i]->qty, $this->lines[$i]->subprice, $langs->trans("InvoiceValidatedInDolibarr",$num));
 							if ($result < 0) {
 								$error++;
+								$this->error = $mouvP->error;
 							}
 						}
 					}