Added two convenience methods to access an int/double argument from within a

src/arguments.h

Index: src/arguments.h
===================================================================
--- src/arguments.h	(revision 8259)
+++ src/arguments.h	(working copy)
@@ -63,6 +63,14 @@
     return Handle<S>(reinterpret_cast<S**>(value));
   }
 
+  int smi_at(int index) {
+    return Smi::cast((*this)[index])->value();
+  }
+
+  double number_at(int index) {
+    return (*this)[index]->Number();
+  }
+
   // Get the total number of arguments including the receiver.
   int length() const { return length_; }