revert to previous version using finite as isfinite is too new (C99 which is not covered by std C++).
revert to previous version using finite as isfinite is too new (C99 which
is not covered by std C++).


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@34503 27541ba8-7e3a-0410-8455-c3a389f83636

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