Inlining the function allows the compiler to optimize away the
function completely. Clang 3.7.1 does exactly that.
This leads to an error, if the library is used with python:
% ./overviewer.py
Traceback (most recent call last):
File "/tmp/minecraft/Minecraft-Overviewer/overviewer_core/__init__.py", line 20, in check_c_overviewer
import c_overviewer
ImportError: /tmp/minecraft/Minecraft-Overviewer/overviewer_core/c_overviewer.so: undefined symbol: estimate_blocklevel
Something has gone wrong importing the c_overviewer extension. Please
make sure it is up-to-date (clean and rebuild)
