Replacing some HTTP_POST_VARS uses because it doesn't work always!

Using data_submitted() or $_POST

Merged form MOODLE_14_STABLE

mod/exercise/assessments.php

@@ -879,7 +879,6 @@
         $timenow = time();
         $form = data_submitted();
 
-
         // first do the (teacher's) assessment of the student's submission
         if (! $submission = get_record("exercise_submissions", "id", $form->sid)) {
             error("Update teacher assessment: student's submission record not found");

mod/workshop/assessments.php

@@ -128,7 +128,7 @@
         if (!$assessment = get_record("workshop_assessments", "id", $aid)) {
             error("workshop assessment is misconfigured");
         }
-        $form = data_submitted("nomatch"); // probably always come from the same page, change this statement
+        $form = data_submitted();
 
         // store the comment in the stock comments table
         if ($elementno == 99) { // it's the general comment
@@ -881,7 +881,7 @@
         if (!$assessment = get_record("workshop_assessments", "id", $aid)) {
             error("workshop assessment is misconfigured");
         }
-        $form = data_submitted("nomatch"); // probably always come from the same page, change this statement
+        $form = data_submitted();
 
         // delete the comment from the stock comments table
         if (!delete_records("workshop_stockcomments", "id", $stockcommentid)) {
@@ -1080,7 +1080,7 @@
         // don't fiddle about, delete all the old and add the new!
         delete_records("workshop_grades", "assessmentid",  $assessment->id);
 
-        $form = data_submitted("nomatch"); // probably always come from the same page, change this statement
+        $form = data_submitted();
 
         //determine what kind of grading we have
         switch ($workshop->gradingstrategy) {