simplify backproperrorsv2cached.cl slightly
simplify backproperrorsv2cached.cl slightly

MiniLight/DeepCL,hughperkins/DeepCL,Peilong/DeepCL,pimms/DeepCL,FighterLYL/DeepCL,FighterLYL/DeepCL,MiniLight/DeepCL,Peilong/DeepCL,mrgloom/DeepCL,FighterLYL/DeepCL,mrgloom/DeepCL,mrgloom/DeepCL,Peilong/DeepCL,Peilong/DeepCL,mrgloom/DeepCL,pimms/DeepCL,pimms/DeepCL,hughperkins/DeepCL,FighterLYL/DeepCL,hughperkins/DeepCL,MiniLight/DeepCL,mrgloom/DeepCL,FighterLYL/DeepCL,MiniLight/DeepCL,Peilong/DeepCL,MiniLight/DeepCL,pimms/DeepCL,pimms/DeepCL,hughperkins/DeepCL,hughperkins/DeepCL