Loading stalled: stop fragment loading results in multiple full player restarts and, finally, freeze

`Loading stalled: stop fragment loading` results in complete player freeze after multiple player restarts.
No 'Error' events can be catched thru ExternalInterface (flashvars => callback). Due to no errors it's not possible to detect this problem via JS and restart the player one more time (or even more than one?).

Log goes here:
[flashls-log.pdf](https://github.com/mangui/flashls/files/261422/flashls-log.pdf)

Any workarounds or suggestions until you will be able to release new version?

Start with the attached flashls-log.pdf and reproduce the “Loading stalled: stop fragment loading” sequence in the Flash player. Inspect the ExternalInterface callback and flashvars error path described in the issue, then verify that the stall is surfaced or handled without repeated full player restarts and an eventual freeze.

Written by the indexing model from the issue text.