fixed preprocessor guard in TestRadixSortVariableBits test
fixed preprocessor guard in TestRadixSortVariableBits test

--HG--
extra : convert_revision : svn%3A83215879-3e5a-4751-8c9d-778f44bb06a5/trunk%40350

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