Cannot convert IOErrorEvent to Error when assets aren't found.

[jackwlee01]

When Flump can't find the assets isn't giving me a proper error, it is instead throwing this runtime error.

TypeError: Error #1034: Type Coercion failed: cannot convert flash.events::IOErrorEvent@1276ed281 to Error.
at RListener1/onEmit()
at react::AbstractSignal$/EMIT()
at react::Reactor/notify()
at react::AbstractSignal/notifyEmit()
at react::Signal/emit()
at flump.executor::Future/onFailure()
at flump.executor::FutureTask/fail()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at deng.fzip::FZip/defaultErrorHandler()