I posted the following comment, in github, about fixing
pgr_apspWarshall
https://github.com/pgRouting/pgrouting/issues/324#issuecomment-154152708
the branch where this work is taking place is:
https://github.com/cvvergara/pgrouting/tree/warshall-dev
(notice is in my fork)
The current travis test can be seen here:
https://travis-ci.org/cvvergara/pgrouting/builds/89502214
Please any comments would be appreciated. (post them in github)
Vicky