as get_last_chunk returns "new" if it didn't find a last_chunk, last_chunk needs to be reset to 0 in that case. And I fixed a typo in an error message.
as get_last_chunk returns "new" if it didn't find a last_chunk, last_chunk needs to be reset to 0 in that case.
And I fixed a typo in an error message.

Ensembl/ensembl-pipeline,Ensembl/ensembl-pipeline,Ensembl/ensembl-pipeline