Convert CUDA scan kernel to use the index-less version of dereference.
Convert CUDA scan kernel to use the index-less version of dereference.

hemmingway/thrust,allendaicool/thrust,rdmenezes/thrust,lishi0927/thrust,Vishwa07/thrust,google-code-export/thrust,hemmingway/thrust,h1arshad/thrust,UIKit0/thrust,allendaicool/thrust,h1arshad/thrust,allendaicool/thrust,Vishwa07/thrust,hemmingway/thrust,lishi0927/thrust,julianromera/thrust,lishi0927/thrust,UIKit0/thrust,h1arshad/thrust,allendaicool/thrust,julianromera/thrust,malenie/thrust,levendlee/thrust,Vishwa07/thrust,h1arshad/thrust,hemmingway/thrust,google-code-export/thrust,levendlee/thrust,bfurtaw/thrust,lishi0927/thrust,bfurtaw/thrust,rdmenezes/thrust,julianromera/thrust,bfurtaw/thrust,malenie/thrust,julianromera/thrust,levendlee/thrust,bfurtaw/thrust,UIKit0/thrust,malenie/thrust,UIKit0/thrust,Vishwa07/thrust,rdmenezes/thrust,google-code-export/thrust,rdmenezes/thrust,malenie/thrust,levendlee/thrust,google-code-export/thrust