EllisLab/CodeIgniter — pull request #2368 by qu1j0t3 (2013-03-29 20:49:59+00:00)
Title: Use float to work with migration versions for compatibility with 32-bit PHP

See https://github.com/EllisLab/CodeIgniter/pull/1949#issuecomment-15660013

Signed-off-by: Toby Thain