Change to TranscriptUtils.pm
Changed the way the legnth of the translated sequence is calculated from using the length
called from the translation object itself to instead use transcript->translate->length.
This gets around the problem that some translation objects have their transcript key defined
as empty string instead of pointing to a hash. Previously the sequence was empty string and
thus gave a length of 0. In future I will find out why this situation even occurs, but as
it was normal before, this fix should at least give the correct length and translation.