[Kanegasi]

Replace everything you have here with the following:

local f=CreateFrame("frame")
f:RegisterEvent("PLAYER_LOGIN")
f.update=function(frame)
    if frame and frame.unit=="player" and frame.portrait then
        if frame.onHateList then
            for i=1,GetNumShapeshiftForms() do
                local _,active,_,spellid=GetShapeshiftFormInfo(i)
                local _,_,icon=GetSpellInfo(spellid)
                if active and icon then
                    SetPortraitToTexture(frame.portrait,icon)
                    return
                end
            end
        end
        SetPortraitTexture(frame.portrait,"player")
    end
end
f:SetScript("OnEvent",function(self,event)
    if event=="PLAYER_LOGIN" then
        local _,class=UnitClass("player")
        if class~="WARRIOR" then return end
        self:RegisterEvent("PLAYER_REGEN_DISABLED")
        self:RegisterEvent("PLAYER_REGEN_ENABLED")
        self:RegisterEvent("UPDATE_SHAPESHIFT_FORM")
        hooksecurefunc("UnitFramePortrait_Update",self.update)
    end
    self.update(PlayerFrame)
end)