Verification in the spei source codes

[wkqian06]

Hi there, thank you for creating this wonderful package!

I found something strange when I went into the spei source codes from Lines 282-286

      if (distribution == "Gamma" | distribution == "PearsonIII") {
        spei[ff, s] <- qnorm(pze + (1 - pze) * pnorm(spei[ff, 
          s]))
      }
      spei[ff, s] <- qnorm(cdf_res)

The Lines 282-285 seem useless because the spei[ff, s] are set to NA according to the precious setting in Line 222 spei <- acu * NA.

So, do you think it should be ignored? which makes sense because cdf_res is the essential one for the final spei.