* src/*.c: Include "error.h" instead of simply declaring
-rw-r--r-- 17982 COPYING
-rw-r--r-- 5458 INSTALL
drwxr-xr-x - doc
drwxr-xr-x - lib
drwxr-xr-x - old
drwxr-xr-x - src
drwxr-xr-x - tests