modules: update documentation examples so they compile under ccanlint.
[ccan] / ccan / btree /
drwxr-xr-x   ..
lrwxrwxrwx 22 LICENCE -> ../../licences/BSD-MIT
-rw-r--r-- 5661 _info
-rw-r--r-- 18341 btree.c
-rw-r--r-- 8340 btree.h
drwxr-xr-x - test