Fix leaks to global namespace in OvalePool and OvalePoolGC.

diff --git a/OvalePool.lua b/OvalePool.lua
index e7222f6..e150157 100644
--- a/OvalePool.lua
+++ b/OvalePool.lua
@@ -16,6 +16,7 @@ Ovale.OvalePool = OvalePool
 local assert = assert
 local setmetatable = setmetatable
 local tinsert = table.insert
+local tostring = tostring
 local tremove = table.remove
 local wipe = table.wipe
 --</private-static-properties>
@@ -26,16 +27,16 @@ OvalePool.pool = nil
 OvalePool.size = 0
 OvalePool.unused = 0
 OvalePool.__index = OvalePool
-do
-	setmetatable(OvalePool, { __call = function(_, ...) return NewPool(...) end })
-end
 --</public-static-properties>

 --<private-static-methods>
-function NewPool(...)
-	local obj = setmetatable({ name = ... }, OvalePool)
-	obj:Reset()
-	return obj
+do
+	local function NewPool(...)
+		local obj = setmetatable({ name = ... }, OvalePool)
+		obj:Reset()
+		return obj
+	end
+	setmetatable(OvalePool, { __call = function(_, ...) return NewPool(...) end })
 end
 --</private-static-methods>

@@ -77,6 +78,6 @@ function OvalePool:Reset()
 end

 function OvalePool:Debug()
-	Ovale:FormatPrint("Pool %s has size %d with %d item(s).", self.name, self.size, self.unused)
+	Ovale:FormatPrint("Pool %s has size %d with %d item(s).", tostring(self.name), self.size, self.unused)
 end
 --</public-static-methods>
diff --git a/OvalePoolGC.lua b/OvalePoolGC.lua
index 7a1259b..a0ded75 100644
--- a/OvalePoolGC.lua
+++ b/OvalePoolGC.lua
@@ -14,6 +14,7 @@ Ovale.OvalePoolGC = OvalePoolGC

 --<private-static-properties>
 local setmetatable = setmetatable
+local tostring = tostring
 --</private-static-properties>

 --<public-static-properties>
@@ -22,17 +23,16 @@ OvalePoolGC.pool = nil
 OvalePoolGC.size = 0
 OvalePoolGC.unused = 0
 OvalePoolGC.__index = OvalePoolGC
-do
-	setmetatable(OvalePoolGC, { __call = function(_, ...) return NewPool(...) end })
-end
-
 --</public-static-properties>

 --<private-static-methods>
-function NewPool(...)
-	local obj = setmetatable({ name = ... }, OvalePoolGC)
-	obj:Reset()
-	return obj
+do
+	local function NewPool(...)
+		local obj = setmetatable({ name = ... }, OvalePoolGC)
+		obj:Reset()
+		return obj
+	end
+	setmetatable(OvalePoolGC, { __call = function(_, ...) return NewPool(...) end })
 end
 --</private-static-methods>

@@ -53,6 +53,6 @@ function OvalePoolGC:Reset()
 end

 function OvalePoolGC:Debug()
-	Ovale:FormatPrint("Pool %s has size %d.", self.name, self.size)
+	Ovale:FormatPrint("Pool %s has size %d.", tostring(self.name), self.size)
 end
 --</public-static-methods>