noAutoFinish: "finish" callback is called when a purchase failed

[j3k0]

@maxmoore14 : do you remember if it necessary to call StoreKit's finish on a failed transaction?

https://github.com/j3k0/PhoneGap-InAppPurchase-iOS/blob/master/src/ios/InAppPurchase.m#L403-L407

Anyway, I don't think user side's finish() callback should be called in that case, or maybe with a error code as a parameter. The behavior is especially weird when storekit.purchase() is called again by the user on a product with non-finished transaction in progress: this results in a failed transaction and user code's finish() callback called directly... Could be mind-bugging ;)

Any thoughts?