Fix sdk_x86-eng build error about possible use of uninitialized fields

Change-Id: I03864b2e97ba968c0826d1f62d87e6c894b4e31f
diff --git a/src/jdwp/object_registry.cc b/src/jdwp/object_registry.cc
index 9136506..1e21ed0 100644
--- a/src/jdwp/object_registry.cc
+++ b/src/jdwp/object_registry.cc
@@ -50,6 +50,10 @@
   ScopedObjectAccessUnchecked soa(Thread::Current());
   MutexLock mu(soa.Self(), lock_);
   ObjectRegistryEntry dummy;
+  dummy.jni_reference_type = JNIWeakGlobalRefType;
+  dummy.jni_reference = NULL;
+  dummy.reference_count = 0;
+  dummy.id = 0;
   std::pair<object_iterator, bool> result = object_to_entry_.insert(std::make_pair(o, dummy));
   ObjectRegistryEntry& entry = result.first->second;
   if (!result.second) {