Also, I assume that you were over the age of 60 when you were given zostervax and it is assumed that most over 60 did have varicella even though never had the pox.
You are probably protected, and if you did a acquire an infection from your daughter it would be a mild case.
The official recommendation for someone without antibodies (never infected) who accidentally gets zostervax instead of the simple varicella vaccine should get the second dose of varicella vaccine with zostervax counted as the first of the two dose regimen.
I think you do not need to worry
The U.S. Center for Disease Control and Prevention (CDC) recommends the following chickenpox (varicella) vaccination schedules for all healthy teenagers and adults who have never had chickenpox or the vaccine should receive 2 doses of the varicella vaccine, given 4 - 8 weeks apart.