b001517f54
Fix bug with od/hd/hexdump. "*" lines are supposed to indicate one or duplicates of the previous line, but a small file with less then 16 characters of zeros in it will be falsy identified as a repeat of the (non-existant) previous line. i.e. the first line of output winds up being a "*". Added a bit of code to handle the degenerate 'there is no previous line' case for the first line.