Workaround for invalid netting channel
Workaround for invalid netting channel

Workaround for https://github.com/raiden-network/raiden/issues/739
Handle ValueError to avoid raiden crashing when retrieving a channel
that killed itself after close+settle.
TODO: implement proper cleanup of such channels

tomashaber/raiden,hackaugusto/raiden,tomashaber/raiden,tomashaber/raiden,hackaugusto/raiden,tomashaber/raiden,tomashaber/raiden