Hello,
Because it is just a PHP notice, it won't be include in the current package ; but it could be in next release if it really the right solution.
Since the patch is to avoid a warning when a state do not have a "code 3" content and every HikaShop states have "code 3" ; it indicates that the source of your issue is related to an incorrect configuration ; I did not performed the debugging but I suppose that you do not have a state (unpublished field) of you created manually the state and the data is not present.
Hiding the notice won't change the fact that there is no "code 3" state information passed to UPS and that might generated some unwanted effects.
UPS need the customer shipping address to give you a quote ; a shipping address includes the state.
I hope that you do understand what I'm explaining.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.