Setting a minimum bar height

diff --git a/Libs/LibArtifactData-1.0/LibArtifactData-1.0.lua b/Libs/LibArtifactData-1.0/LibArtifactData-1.0.lua
index aae7f50..3767d5f 100644
--- a/Libs/LibArtifactData-1.0/LibArtifactData-1.0.lua
+++ b/Libs/LibArtifactData-1.0/LibArtifactData-1.0.lua
@@ -1,4 +1,4 @@
-local MAJOR, MINOR = "LibArtifactData-1.0", 6
+local MAJOR, MINOR = "LibArtifactData-1.0", 7

 assert(_G.LibStub, MAJOR .. " requires LibStub")
 local lib = _G.LibStub:NewLibrary(MAJOR, MINOR)
@@ -225,6 +225,10 @@ end
 local function GetViewedArtifactData()
 	GetArtifactKnowledge()
 	local itemID, _, name, icon, unspentPower, numRanksPurchased = GetArtifactInfo() -- TODO: appearance stuff needed? altItemID ?
+	if not itemID then
+		Debug("|cffff0000ERROR:|r", "GetArtifactInfo() returned nil.")
+		return
+	end
 	viewedID = itemID
 	Debug("GetViewedArtifactData", name, itemID)
 	local numRanksPurchasable, power, maxPower = GetNumPurchasableTraits(numRanksPurchased, unspentPower)
@@ -305,11 +309,11 @@ local function InitializeScan(event)
 end

 function private.PLAYER_ENTERING_WORLD(event)
+	frame:UnregisterEvent(event)
 	_G.C_Timer.After(5, function()
 		InitializeScan(event)
 		frame:RegisterEvent("PLAYER_EQUIPMENT_CHANGED")
 		frame:RegisterEvent("CURRENCY_DISPLAY_UPDATE")
-		frame:UnregisterEvent("PLAYER_ENTERING_WORLD")
 	end)
 end

@@ -348,6 +352,10 @@ function private.ARTIFACT_XP_UPDATE(event)
 	local numRanksPurchasable, power, maxPower = GetNumPurchasableTraits(numRanksPurchased, unspentPower)

 	local artifact = artifacts[itemID]
+	if not artifact then
+		Debug("|cffff0000ERROR:|r", "artifact", itemID, "not found.")
+		return
+	end
 	local diff = unspentPower - artifact.unspentPower

 	if numRanksPurchased ~= artifact.numRanksPurchased then
diff --git a/modules/currency.lua b/modules/currency.lua
index 0964711..0bc514e 100644
--- a/modules/currency.lua
+++ b/modules/currency.lua
@@ -77,6 +77,10 @@ function CurrencyModule:Refresh()
     --self.xpFrame = self.xpFrame or CreateFrame("BUTTON", nil, self.currencyFrame)

     local textHeight = floor((xb:GetHeight() - 4) / 2)
+    local barHeight = (iconSize - textHeight - 2)
+    if barHeight < 2 then
+      barHeight = 2
+    end
     self.xpIcon:SetTexture(xb.constants.mediaPath..'datatexts\\exp')
     self.xpIcon:SetSize(iconSize, iconSize)
     self.xpIcon:SetPoint('LEFT')
@@ -95,7 +99,7 @@ function CurrencyModule:Refresh()
     end
     self.xpBar:SetMinMaxValues(0, UnitXPMax('player'))
     self.xpBar:SetValue(UnitXP('player'))
-    self.xpBar:SetSize(self.xpText:GetStringWidth(), (iconSize - textHeight - 2))
+    self.xpBar:SetSize(self.xpText:GetStringWidth(), barHeight)
     self.xpBar:SetPoint('BOTTOMLEFT', self.xpIcon, 'BOTTOMRIGHT', 5, 0)

     self.xpBarBg:SetAllPoints()
diff --git a/modules/tradeskill.lua b/modules/tradeskill.lua
index 7df146b..6149d20 100644
--- a/modules/tradeskill.lua
+++ b/modules/tradeskill.lua
@@ -117,6 +117,12 @@ function TradeskillModule:StyleTradeskillFrame(framePrefix, profIndex)
   if skill == cap then
     textHeight = db.text.fontSize
   end
+
+  local barHeight = (iconSize - textHeight - 2)
+  if barHeight < 2 then
+    barHeight = 2
+  end
+
   self[framePrefix..'Icon']:SetTexture(icon)
   self[framePrefix..'Icon']:SetSize(iconSize, iconSize)
   self[framePrefix..'Icon']:SetPoint('LEFT')
@@ -136,7 +142,7 @@ function TradeskillModule:StyleTradeskillFrame(framePrefix, profIndex)
     else
       self[framePrefix..'Bar']:SetStatusBarColor(db.color.normal.r, db.color.normal.g, db.color.normal.b, db.color.normal.a)
     end
-    self[framePrefix..'Bar']:SetSize(self[framePrefix..'Text']:GetStringWidth(), (iconSize - textHeight - 2))
+    self[framePrefix..'Bar']:SetSize(self[framePrefix..'Text']:GetStringWidth(), barHeight)
     self[framePrefix..'Bar']:SetPoint('BOTTOMLEFT', self[framePrefix..'Icon'], 'BOTTOMRIGHT', 5, 0)

     self[framePrefix..'BarBg']:SetAllPoints()