Properly pass InitializationFlag back from ScriptContextTable lookups

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index 22c313ee047c31e2a0cece20cc28b48c433b2b36..b3cf255736d812c15b97c4f136935799d792b52c 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -233,6 +233,7 @@ Handle<Object> Context::Lookup(Handle<String> name, ContextLookupFlags flags,
           }
           *index = r.slot_index;
           *variable_mode = r.mode;
+          *init_flag = r.init_flag;
           *attributes = GetAttributesForMode(r.mode);
           return ScriptContextTable::GetContext(script_contexts,
                                                 r.context_index);