func growPartSize(partIndex int, partSize, putsz int64) bool {
	return (maxObjSize-putsz)/(maxNPart-int64(partIndex)) > partSize
}
func growPartSize(partIndex int, partSize, putsz int64) bool {
	return (maxObjSize-putsz)/(maxNPart-int64(partIndex)) > partSize
}
func growPartSize ( partIndex int , partSize , putsz int64 ) bool { return ( maxObjSize - putsz ) / ( maxNPart - int64 ( partIndex ) ) > partSize }
// returns true unless partSize is large enough
// to achieve maxObjSize with remaining parts
returns true unless partSize is large enough to achieve maxObjSize with remaining parts