--- a/Utility.lua	Sun Apr 29 15:54:32 2012 -0400
+++ b/Utility.lua	Thu May 03 09:04:21 2012 -0400
@@ -22,14 +22,15 @@
 end
 
 function tcopy(to, from)
-  for k,v in pairs(from) do
-    if(type(v)=="table") then
-      to[k] = {}
-      tcopy(to[k], v);
-    else
-      to[k] = v;
+    if not from then to = {}; return end
+    for k,v in pairs(from) do
+        if(type(v)=="table") then
+            to[k] = {}
+            tcopy(to[k], v);
+        else
+            to[k] = v;
+        end
     end
-  end
 end
 
 function shallowCopy(t)