BLI_mempool totalloc was being used un-initialized, normally this would cause bugs but turns out its not used,
ifdef'd it out but keep in the struct in BLI_mempool for now.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@54605 954f8c5b-7b00-dc11-b283-0030488c597c