fix bug in masked, multi-dimensional state space multi-threaded envs - #900

fix bug in masked, multi-dimensional state space multi-threaded envs#900

Graeme22 wants to merge 2 commits into

JuliaReinforcementLearning:mainJuliaReinforcementLearning/ReinforcementLearning.jl:mainfrom

Graeme22:mainGraeme22/ReinforcementLearning.jl:mainCopy head branch name to clipboard