Unconditionally set masquerading template vars.

Then we can use them on pages without sideblocks.
Signed-off-by: Nigel McNie <nigel@catalyst.net.nz>

htdocs/lib/web.php

@@ -524,14 +524,15 @@ EOF;
         $smarty->assign('SIDEBLOCKS', $SIDEBLOCKS);
         $smarty->assign('SIDEBARS', $sidebars);
 
-        if ($USER->get('parentuser')) {
-            $smarty->assign('USERMASQUERADING', true);
-            $smarty->assign('masqueradedetails', get_string('youaremasqueradingas', 'mahara', hsc(display_name($USER))));
-            $smarty->assign('becomeyouagain',
-                ' <a href="' . hsc($wwwroot) . 'admin/users/changeuser.php?restore=1">'
-                . get_string('becomeadminagain', 'admin', $USER->get('parentuser')->name)
-                . '</a>');
-        }
+    }
+
+    if ($USER->get('parentuser')) {
+        $smarty->assign('USERMASQUERADING', true);
+        $smarty->assign('masqueradedetails', get_string('youaremasqueradingas', 'mahara', hsc(display_name($USER))));
+        $smarty->assign('becomeyouagain',
+            ' <a href="' . hsc($wwwroot) . 'admin/users/changeuser.php?restore=1">'
+            . get_string('becomeadminagain', 'admin', $USER->get('parentuser')->name)
+            . '</a>');
     }
 
     return $smarty;