vmem: enable tcache in je_pool_free
Merge pull request #76 from krzycz/vmem-pool_free_tcache

vmem: enable tcache in je_pool_free
vmem: add asserts checking binind

Add asserts checking binind when it is
a return value of small_size2bin()
(like in arena.c:1701 and 1858).
It fixes issues reported by Klocwork.
Merge pull request #77 from ldorau/vmem-add-asserts-checking-binind

vmem: add asserts checking binind