alloc: fix missing header in compilation of example.
[ccan] / tools / ccanlint /
drwxr-xr-x   ..
-rw-r--r-- 1305 Makefile
-rw-r--r-- 11386 ccanlint.c
-rw-r--r-- 5661 ccanlint.h
drwxr-xr-x - compulsory_tests
-rw-r--r-- 12762 file_analysis.c
drwxr-xr-x - test
drwxr-xr-x - tests