Every limitation in any conveyance or will disposing of real or personal property, contingent upon the dying of any person without heirs, or heirs of the body, or issue of the body, or children, or offspring, or descendant, or other relative shall be construed as a limitation, to take effect when such person shall die, not having such heir, or issue, or child, or offspring, or descendant, or other relative, as the case may be, living at the time of his death, or en ventre sa mere at the time of his death and born alive thereafter, unless the intention of such limitation be otherwise plainly declared on the face of the conveyance or will creating it.