batch_size broken in montecarlo

[AshtonSBradley]

batch_size seems to be broken except for the uninteresting default batch_size=num_monte. Throws the error

Error thrown in threaded loop on thread 3: BoundsError(a=Array{Any, 1}[#<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #<null>, #...

[ChrisRackauckas]

Thanks for the report. I will look at it after #235 is done

[ChrisRackauckas]

Fixed during the ensemble change