Language statistics do not add up to 100%

I ran `coala-quickstart --ci` on a project and the language statistics generated were as follows :

The following languages have been automatically detected:
C: 37%
Python: 1%
Markdown: 1%
C++: 0%`

This does not total to 100%. The language statistics for the same project on github were

C: 97.5%
Python: 2.3%
Other: 0.2%

Running [linguist](https://github.com/github/linguist) locally fetches the following stats :

97.47% C
2.30% Python
0.14% C++
0.09% Makefile