report mistranslation as a warning rather than an error so do_XXX_dump utilities don't crash
report mistranslation as a warning rather than an error so do_XXX_dump utilities don't crash

mjg17/ensembl,Ensembl/ensembl,willmclaren/ensembl,at7/ensembl,mjg17/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,muffato/ensembl,mjg17/ensembl,mjg17/ensembl,at7/ensembl,muffato/ensembl,at7/ensembl,danstaines/ensembl,at7/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,Ensembl/ensembl,Ensembl/ensembl,muffato/ensembl,james-monkeyshines/ensembl,muffato/ensembl,willmclaren/ensembl,Ensembl/ensembl