CRM-8121 API v3 option_value_create() fails - does not pass sufficient arguments to core

API v3 option_value_create is called, the core method (CRM_Core_BAO_OptionValue::add) throws an error as it does not receive the correct number of parameters.

CRM_Core_BAO_OptionValue::add requires both $params and $ids, but only $params is passed by the API. There is very little information available as to what the $ids array is supposed to be contain, and so proposing a patch is difficult.

I do note that the CRM_Core_BAO_CustomField does not call this particular method, but prefers CRM_Core_BAO_OptionValue::save. However, it is important that this call works for both creation and updates via the API.