Prevent an issue from saving card even the option is unchecked.
Prevent an issue from saving card even the option is unchecked.

Previously the condtion for card saving at the CreditCardObserver is that if the 'omise_save_card' is presented in a request parameter (user checks the 'remembber this card' option).
But in fact, this 'omise_save_card' param is also presented when user once checked the 'remember this card' option and immediately 'unchecked'.

To fix this, we have to check if the 'omise_save_card' param is presented and its value is 'true'.

omise/omise-magento,omise/omise-magento,omise/omise-magento