Fix the bug in the bug fix.

src/type-info.cc

Index: src/type-info.cc
diff --git a/src/type-info.cc b/src/type-info.cc
index 4fd38fa45253098e4fa68d0c1450fdb4c286cc90..b1ab6c411e6d44aed2ec6880d95a174b69969f12 100644
--- a/src/type-info.cc
+++ b/src/type-info.cc
@@ -357,12 +357,13 @@ ZoneMapList* TypeFeedbackOracle::CollectReceiverTypes(int position,
 
 void TypeFeedbackOracle::SetInfo(int position, Object* target) {
   MaybeObject* maybe_result = dictionary_->AtNumberPut(position, target);
-  Object* result;
   USE(maybe_result);
-  USE(result);
+#ifdef DEBUG
+  Object* result;
   // Dictionary has been allocated with sufficient size for all elements.
   ASSERT(maybe_result->ToObject(&result));
   ASSERT(*dictionary_ == result);
+#endif
 }