commit e17ab378c7154d3e2cd2e32ffb0d31794af43cec
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Thu May 16 12:44:11 2013 +0930

    FLO-329: mod/assign: Fix missing capability check for "grand extension" feature
    
    Note: not a security issue - was just showing an erroneous UI option.
    If they didn't have the cap they would subsequently get an error upon
    trying to set an extension.

diff --git a/mod/assign/gradingbatchoperationsform.php b/mod/assign/gradingbatchoperationsform.php
index e2a7284..0f1aef8 100644
--- a/mod/assign/gradingbatchoperationsform.php
+++ b/mod/assign/gradingbatchoperationsform.php
@@ -52,7 +52,7 @@ class mod_assign_grading_batch_operations_form extends moodleform {
         if ($instance['submissiondrafts']) {
             $options['reverttodraft'] = get_string('reverttodraft', 'assign');
         }
-        if ($instance['duedate']) {
+        if ($instance['duedate'] && has_capability('mod/assign:grantextension', $instance['context'])) {
             $options['grantextension'] = get_string('grantextension', 'assign');
         }
 
diff --git a/mod/assign/locallib.php b/mod/assign/locallib.php
index 511f745..6e79f54 100644
--- a/mod/assign/locallib.php
+++ b/mod/assign/locallib.php
@@ -2574,7 +2574,8 @@ class assign {
                                                                   array('cm'=>$this->get_course_module()->id,
                                                                         'submissiondrafts'=>$this->get_instance()->submissiondrafts,
                                                                         'duedate'=>$this->get_instance()->duedate,
-                                                                        'feedbackplugins'=>$this->get_feedback_plugins()),
+                                                                        'feedbackplugins'=>$this->get_feedback_plugins(),
+                                                                        'context'=>$this->context),
                                                                   'post', '',
                                                                   array('class'=>'gradingbatchoperationsform'));
 
@@ -2828,7 +2829,8 @@ class assign {
                                                               array('cm'=>$this->get_course_module()->id,
                                                                     'submissiondrafts'=>$this->get_instance()->submissiondrafts,
                                                                     'duedate'=>$this->get_instance()->duedate,
-                                                                    'feedbackplugins'=>$this->get_feedback_plugins()),
+                                                                    'feedbackplugins'=>$this->get_feedback_plugins(),
+                                                                    'context'=>$this->context),
                                                               'post',
                                                               '',
                                                               array('class'=>'gradingbatchoperationsform'));