eina: this is actually a better way of improving Eina_Hash performance.
eina: this is actually a better way of improving Eina_Hash performance.

This reduce the size of the rbtree part dedicated to the hash key match,
but reuse only bit that weren't matched by the bucket.

Backport from commit 2e9f96cc24f99452bdaf2a4592ea881fe259b86a
on https://git.enlightenment.org/core/efl.git

gfriloux/eina,gfriloux/eina,gfriloux/eina