Fix CDS start and stop in mapping database

During import of the NCBI transcript mappings, CDS start or stop positions
were not picked up for some transcripts (where these are on exon boundaries).

Bug reported by S Venkata Suresh Kumar.


git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@490 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1