Reapply portability fixes, this time without 64 bit system bug.

src/execution.cc

 // Copyright 2006-2008 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 464 matching lines @@
       Call(Top::instantiate_fun(), Top::builtins(), 1, args, exc);
   if (*exc) return Handle<JSFunction>::null();
   return Handle<JSFunction>::cast(result);
 }
 
 
 Handle<JSObject> Execution::InstantiateObject(Handle<ObjectTemplateInfo> data,
                                               bool* exc) {
   if (data->property_list()->IsUndefined() &&
       !data->constructor()->IsUndefined()) {
-    Object* result;
+    // Initialization to make gcc happy.
+    Object* result = 0;

[Søren Thygesen Gjesse, 2009/03/23 10:50:36]

0 -> NULL.

     {
       HandleScope scope;
       Handle<FunctionTemplateInfo> cons_template =
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(data->constructor()));
       Handle<JSFunction> cons = InstantiateFunction(cons_template, exc);
       if (*exc) return Handle<JSObject>::null();
       Handle<Object> value = New(cons, 0, NULL, exc);
       if (*exc) return Handle<JSObject>::null();
       result = *value;
@@ skipping 131 matching lines @@
   // All allocation spaces other than NEW_SPACE have the same effect.
   Heap::CollectGarbage(0, OLD_DATA_SPACE);
   return v8::Undefined();
 }
 
 
 static GCExtension kGCExtension;
 v8::DeclareExtension kGCExtensionDeclaration(&kGCExtension);
 
 } }  // namespace v8::internal