Flowing grouped bar chart problem is not still fixed

Obviously I find https://github.com/masayuki0812/c3/issues/1068 issue is fixed.
But this issue still can be found in [recent version 0.4.11-rc4](https://github.com/c3js/c3/releases/tag/0.4.11-rc4).
http://jsfiddle.net/say8425/h7a8q6r9/8/

So I looked up source and I found some `if condition` and `break point` is missed that was added at https://github.com/masayuki0812/c3/commit/4c193b034256036e3f3b8a5d693c3a64311bc19f. So I add missed condition and break point again, then it looks work well.

I think maybe this code is missed in mistake.

Reproduce the grouped bar chart with the linked JSFiddle using the recent 0.4.11-rc4 version, then compare the relevant source with commit 4c193b034256036e3f3b8a5d693c3a64311bc19f. Done means the missing condition and breakpoint behavior is restored and the grouped chart renders correctly without reproducing the reported problem.

Written by the indexing model from the issue text.