Merge pull request #16 from th3fallen/patch-3

Update EngagePod.php

Author: tholder

src/Silverpop/EngagePod.php

@@ -192,15 +192,15 @@ public function removeContact($databaseID, $email, $customer_id) {
      * Add a contact to a list
      *
      */
-    public function addContact($databaseID, $updateIfFound, $columns, $contactListID = '', $sendAutoReply = false) {
+    public function addContact($databaseID, $updateIfFound, $columns, $contactListID = false, $sendAutoReply = false) {
         $data["Envelope"] = array(
             "Body" => array(
                 "AddRecipient" => array(
                     "LIST_ID" => $databaseID,
                     "CREATED_FROM" => 1,         // 1 = created manually, 2 = opted in
                     "SEND_AUTOREPLY"  => ($sendAutoReply ? 'true' : 'false'),
                     "UPDATE_IF_FOUND" => ($updateIfFound ? 'true' : 'false'),
-                    "CONTACT_LISTS" => array("CONTACT_LIST_ID" => $contactListID),
+                    "CONTACT_LISTS" => ($contactListID) ? array("CONTACT_LIST_ID" => $contactListID) : '',
                     "COLUMN" => array(),
                 ),
             ),