period mean or period diff and labelled columns

[JohannesGuss]

In calc.stError() if year is a labelled column - this can occur if data was imported using haven::read_sav - using period.mean or period.diff will throw an error

library(surveysd)
set.seed(1234)
eusilc <- demo.eusilc(n = 4, prettyNames = TRUE)
dat_boot <- draw.bootstrap(eusilc, REP = 3, hid = "hid", weights = "pWeight",
                           strata = "region", period = "year")
dat_boot_calib <- recalib(dat_boot, conP.var = "gender", conH.var = "region")

dat_boot_calib[, year := haven::labelled(
  as.integer(year), 
  labels = c(`2010` = 2010L, `2011` = 2011L, `2012` = 2012L, `2013` = 2013L))]
err.est <- calc.stError(dat_boot_calib, var = "povertyRisk",
                        fun = weightedRatio, period.mean = 3)
#> Error in rbindlist(l, use.names, fill, idcol) : 
#>   Class attribute on column 1 of item 2 does not match with column 1 of item 1.

TODO

• check this during input checking and call as.integer() or as.numeric() if column ìs.labelled
• test this during devtools::test()