cuda::reduce() now works for partially used blocks
cuda::reduce() now works for partially used blocks

--HG--
extra : convert_revision : svn%3A83215879-3e5a-4751-8c9d-778f44bb06a5/trunk%40635

andrewcorrigan/thrust-multi-permutation-iterator,GrimDerp/thrust,sdalton1/thrust,sarvex/thrust,GrimDerp/thrust,dachziegel/thrust,jaredhoberock/thrust,arnabgho/thrust,marksantos/thrust,mohamed-ali/thrust,zeryx/thrust,Ricardo666666/thrust,zeryx/thrust,xiongzhanblake/thrust_src,jaredhoberock/thrust,egaburov/thrust,raygit/thrust,zhenglaizhang/thrust,sarvex/thrust,egaburov/thrust,dachziegel/thrust,thrust/thrust,arnabgho/thrust,raygit/thrust,andrewcorrigan/thrust-multi-permutation-iterator,Ricardo666666/thrust,xiongzhanblake/thrust,jaredhoberock/thrust,sarvex/thrust,thrust/thrust,andrewcorrigan/thrust-multi-permutation-iterator,jaredhoberock/thrust,mohamed-ali/thrust,thrust/thrust,raygit/thrust,marksantos/thrust,mohamed-ali/thrust,marksantos/thrust,thvasilo/thrust,thrust/thrust,thvasilo/thrust,dachziegel/thrust,sdalton1/thrust,egaburov/thrust,arnabgho/thrust,xiongzhanblake/thrust_src,Ricardo666666/thrust,thrust/thrust,zhenglaizhang/thrust,jaredhoberock/thrust,zeryx/thrust,thvasilo/thrust,GrimDerp/thrust,xiongzhanblake/thrust,sdalton1/thrust,zhenglaizhang/thrust,xiongzhanblake/thrust_src,xiongzhanblake/thrust