update code toward php8 compliance

htdocs/product/admin/product.php

@@ -716,7 +716,7 @@ print '</tr>';
 */
 
 // View product description in thirdparty language
-if (!empty($conf->global->MAIN_MULTILANGS)) {
+if (getDolGlobalInt('MAIN_MULTILANGS')) {
 	print '<tr class="oddeven">';
 	print '<td>'.$langs->trans("ViewProductDescInThirdpartyLanguageAbility").'</td>';
 	print '<td class="right">';

htdocs/product/index.php

@@ -347,7 +347,7 @@ if ((isModEnabled("product") || isModEnabled("service")) && ($user->rights->prod
 				}
 
 				// Multilangs
-				if (!empty($conf->global->MAIN_MULTILANGS)) {
+				if (getDolGlobalInt('MAIN_MULTILANGS')) {
 					$sql = "SELECT label";
 					$sql .= " FROM ".MAIN_DB_PREFIX."product_lang";
 					$sql .= " WHERE fk_product = ".((int) $objp->rowid);

htdocs/product/list.php

@@ -179,7 +179,7 @@ $fieldstosearchall = array(
 
 );
 // multilang
-if (!empty($conf->global->MAIN_MULTILANGS)) {
+if (getDolGlobalInt('MAIN_MULTILANGS')) {
 	$fieldstosearchall['pl.label'] = 'ProductLabelTranslated';
 	$fieldstosearchall['pl.description'] = 'ProductDescriptionTranslated';
 	$fieldstosearchall['pl.note'] = 'ProductNoteTranslated';
@@ -444,7 +444,7 @@ if (!empty($searchCategoryProductList) || !empty($catid)) {
 }
 $sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product_fournisseur_price as pfp ON p.rowid = pfp.fk_product";
 // multilang
-if (!empty($conf->global->MAIN_MULTILANGS)) {
+if (getDolGlobalInt('MAIN_MULTILANGS')) {
 	$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product_lang as pl ON pl.fk_product = p.rowid AND pl.lang = '".$db->escape($langs->getDefaultLang())."'";
 }
 
@@ -1309,7 +1309,7 @@ if ($resql) {
 		$obj = $db->fetch_object($resql);
 
 		// Multilangs
-		if (!empty($conf->global->MAIN_MULTILANGS)) {  // If multilang is enabled
+		if (getDolGlobalInt('MAIN_MULTILANGS')) {  // If multilang is enabled
 			$sql = "SELECT label";
 			$sql .= " FROM ".MAIN_DB_PREFIX."product_lang";
 			$sql .= " WHERE fk_product = ".((int) $obj->rowid);

htdocs/product/popuprop.php

@@ -214,7 +214,7 @@ print "</tr>\n";
 if ($mode && $mode != '-1') {
 	foreach ($infoprod as $prodid => $vals) {
 		// Multilangs
-		if (!empty($conf->global->MAIN_MULTILANGS)) { // si l'option est active
+		if (getDolGlobalInt('MAIN_MULTILANGS')) { // si l'option est active
 			$sql = "SELECT label";
 			$sql .= " FROM ".MAIN_DB_PREFIX."product_lang";
 			$sql .= " WHERE fk_product = ".((int) $prodid);

htdocs/product/reassortlot.php

@@ -608,7 +608,7 @@ while ($i < $imaxinloop) {
 	$objp = $db->fetch_object($resql);
 
 	// Multilangs
-	if (!empty($conf->global->MAIN_MULTILANGS)) { // si l'option est active
+	if (getDolGlobalInt('MAIN_MULTILANGS')) { // si l'option est active
 		// TODO Use a cache
 		$sql = "SELECT label";
 		$sql .= " FROM ".MAIN_DB_PREFIX."product_lang";