Fix xcode build warning in shell.cc

samples/shell.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 139 matching lines @@
     // which is not enough to parse the big literal expressions used in tests.
     // The stack size should be at least StackGuard::kLimitSize + some
     // OS-specific padding for thread startup code.
     options.stack_size = 2 << 20;  // 2 Mb seems to be enough
     return options;
   }
 
   class IsolateThread : public v8::internal::Thread {
    public:
     explicit IsolateThread(SourceGroup* group)
-        : group_(group), v8::internal::Thread(NULL, GetThreadOptions()) {}
+        : v8::internal::Thread(NULL, GetThreadOptions()), group_(group) {}
 
     virtual void Run() {
       group_->ExecuteInThread();
     }
 
    private:
     SourceGroup* group_;
   };
 
   void ExecuteInThread() {
@@ skipping 354 matching lines @@
       printf("^");
     }
     printf("\n");
     v8::String::Utf8Value stack_trace(try_catch->StackTrace());
     if (stack_trace.length() > 0) {
       const char* stack_trace_string = ToCString(stack_trace);
       printf("%s\n", stack_trace_string);
     }
   }
 }