fixing issue with mail subject localization

sails/src/api/controllers/StudentController.js

@@ -379,6 +379,7 @@ module.exports = {
     // As it can be resolved through two possibilities, better to use promises!
     //
     var getStudent = new Promise(function(resolve, reject) {
+
       if (!params.id_stu && params.license) {
         // get student, license attribute will be completed
         License.getStudent(params.license, function(err, s) {
@@ -462,16 +463,18 @@ module.exports = {
    * @param {response} {}
    */
   unlink_supervisor: function (req, res) {
+    var params = req.allParams();
+
     StuSup.findOne({
-      student: req.param('id_stu'),
-      supervisor: req.param('id_sup')
+      student: params.id_stu,
+      supervisor: params.id_sup
     })
     .populate('supervisor')
     .then((stuSup) => {
       if (!stuSup)
         throw new Error("student and supervisor are not linked");
 
-      return [stuSup, Student.findOne(req.params.id_stu).populate('license')];
+      return [stuSup, Student.findOne(params.id_stu).populate('license')];
     })
     .spread((stuSup, student) => {
 
@@ -502,7 +505,7 @@ module.exports = {
 
         var subject = sails.__({
           phrase: 'notification_from_pictogram',
-          locale: params.lang || 'es-es'
+          locale: supervisor.lang || 'es-es'
         });
 
         console.log("-->" + message);