get_data update.
Update to fix issue #1 pointed out by ctberthiaume.
This issue did not exists on Ubuntu 13.04 64bit with MUMmer 3.23, muscle
3.8.31 and blast+ 2.2.28; however on CentOS 5.9 with the same program
versions, I verified this bug.
This fixes the bug, all tests pass on both test systems.