[opw-web] Don't allow signing up as mentor or student for an inactive program

[Owen Taylor <otaylor src gnome org>]

commit dfe84234056136e01e74bab7013e67754914ee3b
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Tue Oct 18 13:10:47 2016 -0400

    Don't allow signing up as mentor or student for an inactive program

 utils.php |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/utils.php b/utils.php
index 514a709..e80cc8f 100644
--- a/utils.php
+++ b/utils.php
@@ -157,7 +157,7 @@ class ProjectPermissions {
                         $can_submit = true;
                 }
             }
-        } else if ($role == 'g' || $role == 'r' || $role == 'x') {
+        } else if ($program_data['is_active'] && ($role == 'g' || $role == 'r' || $role == 'x')) {
             if ($core->timestamp <= $program_data['dl_student']) {
                 $can_apply_student = true;
                 $can_apply_mentor = true;