Save memory by not creating many small Lua tables per frame refresh.

diff --git a/Ovale.lua b/Ovale.lua
index 03d9b68..ca672fb 100644
--- a/Ovale.lua
+++ b/Ovale.lua
@@ -19,6 +19,7 @@ local pairs = pairs
 local strsplit = string.split
 local tinsert = table.insert
 local tsort = table.sort
+local wipe = table.wipe
 local API_GetTime = GetTime
 local API_RegisterAddonMessagePrefix = RegisterAddonMessagePrefix
 local API_SendAddonMessage = SendAddonMessage
@@ -225,7 +226,7 @@ function Ovale:UpdateFrame()

 	self:UpdateVisibility()

-	self.checkBoxes = {}
+	wipe(self.checkBoxes)

 	for k,checkBox in pairs(self.casesACocher) do
 		self.checkBoxes[k] = LibStub("AceGUI-3.0"):Create("CheckBox");
@@ -241,7 +242,7 @@ function Ovale:UpdateFrame()
 		self.checkBoxes[k]:SetCallback("OnValueChanged",OnCheckBoxValueChanged)
 	end

-	self.dropDowns = {}
+	wipe(self.dropDowns)

 	if (self.listes) then
 		for k,list in pairs(self.listes) do
diff --git a/OvaleCondition.lua b/OvaleCondition.lua
index 57ec64c..4e70855 100644
--- a/OvaleCondition.lua
+++ b/OvaleCondition.lua
@@ -28,8 +28,8 @@ local OvaleSwing = Ovale.OvaleSwing
 local floor = floor
 local pairs = pairs
 local select = select
-local strfind = string.dinf
 local tostring = tostring
+local wipe = table.wipe
 local API_GetBuildInfo = GetBuildInfo
 local API_GetItemCooldown = GetItemCooldown
 local API_GetItemCount = GetItemCount
@@ -417,7 +417,11 @@ local function getTargetDead(target)
 	if self_targetGUID[target] ~= API_UnitGUID(target) then
 		self_lastSaved[target] = nil
 		self_targetGUID[target] = API_UnitGUID(target)
-		self_savedHealth[target] = {}
+		if self_savedHealth[target] then
+			wipe(self_savedHealth[target])
+		else
+			self_savedHealth[target] = {}
+		end
 	end
 	local newHealth = API_UnitHealth(target)
 	if newHealth then
diff --git a/OvaleFrame.lua b/OvaleFrame.lua
index 97605f4..4c7e91a 100644
--- a/OvaleFrame.lua
+++ b/OvaleFrame.lua
@@ -280,7 +280,7 @@ do
 			end
 		end

-		Ovale.refreshNeeded = {}
+		wipe(Ovale.refreshNeeded)

 		if (not Ovale.bug) then
 			Ovale.traced = false