MDL-4781 forum: show discussion link when user has ability to view discussion

Conflicts:
	mod/forum/lib.php

mod/forum/lib.php

@@ -5569,7 +5569,7 @@ function forum_print_latest_discussions($course, $forum, $maxdiscussions=-1, $di
                     $link = true;
                 } else {
                     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
-                    $link = forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext);
+                    $link = forum_user_can_see_discussion($forum, $discussion, $modcontext, $USER);
                 }
 
                 $discussion->forum = $forum->id;