Unless the cuts are in a critical area of a tension member, like under the downtube up near the head, I wouldn't sweat it. These frames are made of a relative ductile grade of steel and are considerably overbuilt by today's standards. If the cut is deep enough to cause a crack, it'll take some time, and propagate slowly giving you plenty of warning. Hopefully the fork is unaffected because there's much less (zero) safety margin if a fork should fail for any reason.
Even if it's in a critical tension area, I still wouldn't sweat, but I'd keep a closer eye on it.
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