Encode a zeroed transaction ID as an empty string
Encode a zeroed transaction ID as an empty string

The transaction "0" output was observed in the generate command output.
This ensures the value is empty for non-transacted data.

Signed-off-by: Byron Ruth <e9d71f5ee7c92d6dc9e92ffdad17b8bd49418f98@devel.io>

chop-dbhi/origins,chop-dbhi/origins