Don't do any cleanup if the operation never actually started to begin with.
Don't do any cleanup if the operation never actually started to begin with.

TODO: Fix it so the callee is at least notified of the cancellation

xNUTs/MIT-Mobile-for-iOS,MIT-Mobile/MIT-Mobile-for-iOS,xNUTs/MIT-Mobile-for-iOS,smartcop/MIT-Mobile-for-iOS,smartcop/MIT-Mobile-for-iOS,MIT-Mobile/MIT-Mobile-for-iOS