Fix upvalues that allow closures to work properly.

src/main/java/lua/io/Closure.java

@@ -14,7 +14,7 @@ public class Closure extends LValue {
 		this.p = p;
 		upVals = new UpVal[p.nups];
 		for ( int i=0; i<p.nups; i++ )
-			upVals[i] = new UpVal();
+			upVals[i] = new UpVal( p.upvalues[i] );
 	}
 
 

src/main/java/lua/io/UpVal.java

@@ -1,5 +1,20 @@
 package lua.io;
 
+import lua.value.LNil;
+import lua.value.LString;
+import lua.value.LValue;
+
 public class UpVal {
 
+	private LString name;
+	public LValue value;
+	
+	public UpVal( LString string ) {
+		this.name = string;
+	}
+		
+	public String toString() {
+		return "up("+name+")";
+	}
+
 }