[Bugfix] Need to convert back from `uint` to `accum`/`value_t`.
[Bugfix] Need to convert back from `uint` to `accum`/`value_t`.

ctn-archive/nengo_spinnaker_2014,ctn-archive/nengo_spinnaker_2014,ctn-archive/nengo_spinnaker_2014,ctn-archive/nengo_spinnaker_2014