+ * we get "time=0" right)
+ * sadly with a recent change that first entry may no longer
+ * have any pressure reading - in that case just grab the
+ * pressure from the second entry */
+ if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
+ INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);