Method findResolve

This is the constant version of resolveInFlow. If a resulting subtype has already been calculated, for the particular read (\b slot >= 0) or write (\b slot == -1), then return it. Otherwise return the original data-type. \param op is the PcodeOp using the Varnode assigned with \b this data-type \param slot is the slot reading or writing the Varnode \return the resolved subtype or the original dat