library: improve support of dynamic numa nodes, <stat>

library: improve support of dynamic numa nodes, <stat>

If, in fact, numa nodes are dynamic (like that current
total of on-line cpus) the existing logic was lacking.
It included an early return before checking the total.

So, this commit ensures that the nodes total is always
set or updated consistently in only a single function.
There's no need to set it at the time 'new' is called.

[ and since under our existing code this nodes total ]
[ could never possibly have been zero, the erroneous ]
[ test (with the early return) has now been whacked! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>