Fix #685946, original patch by mvc, alternate solution by me: Don't cause a...

Fix #685946, original patch by mvc, alternate solution by me: Don't cause a php warning when attempting to load an unsupported country.

Additionally, document the function properly and return success or failure while I'm already here working on it.
(cherry picked from commit 541bba4d96ef3671982072f55374eb3616aa253d)