Merge branch '2022.5.3_rc_index_php_warning_undefined_property' into '2022.5.1'

undefined property warning in line 102 and 122 corrected

See merge request dolibarr-extension/massupdaterights!1

index.php

@@ -99,7 +99,7 @@ if ($caneditgroup) {
     // Export
     print '<form name="userfile" action="' . $_SERVER["PHP_SELF"] . '" METHOD="POST">';
     print '<input type="hidden" name="token" value="' . $_SESSION['newtoken'] . '">';
-    print '<input type="hidden" name="max_file_size" value="' . $conf->maxfilesize . '">';
+    print '<input type="hidden" name="max_file_size" value="' . empty($conf->maxfilesize)?'':$conf->maxfilesize . '">';
     print '<input type="hidden" name="action" value="export_groups">';
 
     print '<table class="noborder" width="100%" cellspacing="0" cellpadding="4">';
@@ -119,7 +119,7 @@ if ($caneditgroup) {
     // Import
     print '<form name="userfile" action="' . $_SERVER["PHP_SELF"] . '" enctype="multipart/form-data" METHOD="POST">';
     print '<input type="hidden" name="token" value="' . $_SESSION['newtoken'] . '">';
-    print '<input type="hidden" name="max_file_size" value="' . $conf->maxfilesize . '">';
+    print '<input type="hidden" name="max_file_size" value="' . empty($conf->maxfilesize)?'':$conf->maxfilesize . '">';
     print '<input type="hidden" name="action" value="import_groups">';
 
     print '<table class="noborder" width="100%" cellspacing="0" cellpadding="4">';