All deeds or instruments heretofore executed, revoking any conveyance of future interest made to persons not in esse, are hereby validated insofar as any such deed of revocation may be in conflict with the provisions of G.S. 39-6.
All such deeds of revocation heretofore executed are hereby validated and no such deed of revocation shall be held to be invalid by reason of not having been executed within the six-month period prescribed in the third proviso of G.S. 39-6. (1947, c. 62.)