struct for allocation size
(GSIMapNewNode): When above a certain size only allocate "increment" number
of nodes
(GSIMapResize): Avoid hash table sizes that are odd
(GSIMapInitWithZoneAndCapacity): Put default increment size to 300000
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@18730 72102866-910b-0410-8b05-ffd578937521
