BUG/MINOR: anon: memory illegal accesses in tools.c with hash_anon and hash_ipanon

chipitsine reported in github issue #1872 that in function hash_anon and
hash_ipanon, index_hash can be equal to NB_L_HASH_WORD and can reach an
inexisting line table, the table is initialized hash_word[NB_L_HASH_WORD][20];
so hash_word[NB_L_HASH_WORD] doesn't exist.

No backport needed, except if anonymization mechanism is backported.
1 file changed