small edit to binary_search
small edit to binary_search

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