Fix into emailing

htdocs/opensurvey/fonctions.php

@@ -103,6 +103,8 @@ function showlogo()
  */
 function get_server_name()
 {
+	global $dolibarr_main_url_root;
+
 	$urlwithouturlroot=preg_replace('/'.preg_quote(DOL_URL_ROOT,'/').'$/i','',trim($dolibarr_main_url_root));
 	$urlwithroot=$urlwithouturlroot.DOL_URL_ROOT;		// This is to use external domain name found into config file
 	//$urlwithroot=DOL_MAIN_URL_ROOT;					// This is to use same domain name than current

htdocs/opensurvey/public/studs.php

@@ -139,7 +139,7 @@ if (isset($_POST["boutonp"]) || isset($_POST["boutonp_x"]))
 				if (! empty($object->mailsonde))
 				{
 					include_once DOL_DOCUMENT_ROOT.'/core/class/CMailFile.class.php';
-					$cmailfile=new CMailFile("[".DOL_APPLICATION_TITLE."] ".$langs->trans("Poll").': '.$object->titre, $object->mail_admin, $conf->global->MAIN_MAIL_EMAIL_FROM, $nom." has filled a line.\nou can find your poll at the link:\n".getUrlSondage($numsondage));
+					$cmailfile=new CMailFile("[".MAIN_APPLICATION_TITLE."] ".$langs->trans("Poll").': '.$object->titre, $object->mail_admin, $conf->global->MAIN_MAIL_EMAIL_FROM, $nom." has filled a line.\nYou can find your poll at the link:\n".getUrlSondage($numsondage));
 					$result=$cmailfile->sendfile();
 					if ($result)
 					{