Nargrym's Steel hand error on equip

[Jamz]

So, I'm trying to put NSH on my Small gnome in Giantslayer, but I get several errors, and it looks like it's related to it trying to adjust the size limitations for my unarmed attack? (I don't have any other slam attacks)

The relevant script is below, I don't have time for a bug fix as I need it tomorrow. Is there a way to fix this? like check if the pick from the foreach is unarmed, then skip it? (FWIW I tested it on a medium creature and it works just fine, so pretty sure it's because I'm small?)

Current script:

 var wepsize as number
      wepsize = herofield[tSize].value + 1

      ~ If we're not equipped, get out now
      doneif (field[gIsEquip].value = 0)

      foreach pick in hero from BaseWep
        if (eachpick.field[gSize].value = wepsize) then
            eachpick.field[gSizeDiff].value -= 1
        endif
      nexteach