Lokaltog/powerline — pull request #75 by ZyX-I (2013-01-19 22:20:14+00:00)
Title: Fixed highlighting when there are only 2 segments in theme

Here are two fixes:
- defaultdict makes it not throw KeyErrors.
- Replacing (False, False) with False makes it not throw vim.error (no color
ctermbg=False)

Please check whether it breaks other renderers, I checked only vim.