added custom error handling to avoid crash in initialization of AXCGiphy
added custom error handling to avoid crash in initialization of AXCGiphy

heyalexchoi/Giphy-iOS,heyalexchoi/Giphy-iOS,nalin/Giphy-iOS,heyalexchoi/Giphy-iOS,nalin/Giphy-iOS,nalin/Giphy-iOS,nalin/Giphy-iOS,heyalexchoi/Giphy-iOS