Bio/DB/Flat/BDB.pm: Windows offset adjustment code is not needed after
removing the offset adjustment conditional from "parse_one_record".
Tests pass.
Bio/Index/Fasta.pm: Removed a fixed offset adjustment for Windows
that was redundant with the new tell()-based offset detection
Bio/SearchIO/SearchResultEventBuilder.pm: Avoid adding hits
if there is no hit (like in bl2seq comparisons with no similarities)