Update SpatialBatchNormalization.lua
Update SpatialBatchNormalization.lua

Fix typo and copy-paste mistake
apaszke/nn,diz-vara/nn,PraveerSINGH/nn,caldweln/nn,sagarwaghmare69/nn,xianjiec/nn,jhjin/nn,eriche2016/nn,colesbury/nn,joeyhng/nn,nicholas-leonard/nn,kmul00/nn,andreaskoepf/nn,jonathantompson/nn,elbamos/nn