fix progress total to be a number
fix progress total to be a number

it was a string before since it was taken from the content-length header

chrisradek/aws-sdk-js,GlideMe/aws-sdk-js,chrisradek/aws-sdk-js,aws/aws-sdk-js,guymguym/aws-sdk-js,jeskew/aws-sdk-js,LiuJoyceC/aws-sdk-js,aws/aws-sdk-js,chrisradek/aws-sdk-js,LiuJoyceC/aws-sdk-js,guymguym/aws-sdk-js,jeskew/aws-sdk-js,guymguym/aws-sdk-js,GlideMe/aws-sdk-js,jeskew/aws-sdk-js,guymguym/aws-sdk-js,chrisradek/aws-sdk-js,aws/aws-sdk-js,jeskew/aws-sdk-js,aws/aws-sdk-js,LiuJoyceC/aws-sdk-js,GlideMe/aws-sdk-js,GlideMe/aws-sdk-js