CodeIgniter Form validation library, empty rules

fix-empty-rules.diff

diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 3536241..70421ce 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -459,6 +459,10 @@ class CI_Form_validation {
                        {
                                $this->_field_data[$field]['postdata'] = $validation_array[$field];
                        }
+                       elseif ( ! empty($row['rules']))
+                       {
+                               continue;
+                       }
 
                        $this->_execute($row, explode('|', $row['rules']), $this->_field_data[$field]['postdata']);
                }