MDL-26234 fix fatal user upload error when custom text area field pre…

…sent

Please note this does not fix problems with the actual upload of custon text area fields.

admin/uploaduser.php

@@ -295,7 +295,13 @@
             }
             if (isset($formdata->$field)) {
                 // process templates
-                $user->$field = process_template($formdata->$field, $user);
+                if (is_array($formdata->$field)) {
+                    foreach ($formdata->$field as $k=>$v) {
+                        $user->$field[$k] = process_template($v, $user);
+                    }
+                } else {
+                    $user->$field = process_template($formdata->$field, $user);
+                }
             }
         }