Made len.nil zero instead of one.

rocketnia · rocketnia · commit 9c0f4fb2b54f · 2011-05-30T00:35:52.000-07:00
diff --git a/arc.arc b/arc.arc
@@ -1787,7 +1787,7 @@
    x 0))
 
 (defmethod len(x) sym
-  1)
+  (if x 1 0))
 
 (defmethod len(x) vec
   ($.vector-length x))
