* The functions now check the acquire_sem() result.
* mem_freetag() will return an status code now, too.
* Moved the mem_block and mem_info definitions into the source file; no
reason to have them public.
* You can now give the memory manager a name which it will use for its
heap area and lock.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17221 a95241bf-73f2-0310-859d-f6bbb57e9c96
