Fix some bugs in Function.prototype.bind implementation.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 18e56c38ef5ada19a43fa4ef0da68530cc0deeaf..6eb13719638a9359fb30e3361e660b990e2fc8cb 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -1105,7 +1105,7 @@ function FunctionBind(this_arg) { // Length is 1.
       throw new $TypeError('Bind must be called on a function');
   }
   // this_arg is not an argument that should be bound.
-  var argc_bound = %_ArgumentsLength() - 1;
+  var argc_bound = (%_ArgumentsLength() || 1) - 1;
   if (argc_bound > 0) {
     var bound_args = new $Array(argc_bound);
     for(var i = 0; i < argc_bound; i++) {