IDL: initialize union member variables (to null/zero)

Source/bindings/tests/results/V8TestTypedefs.cpp

Index: Source/bindings/tests/results/V8TestTypedefs.cpp
diff --git a/Source/bindings/tests/results/V8TestTypedefs.cpp b/Source/bindings/tests/results/V8TestTypedefs.cpp
index 57749650212ba9afebab6d56ef79e7bc48b9f4f2..68ae81945e895ec8c0ed50ccf1e8181b151fe4ff 100644
--- a/Source/bindings/tests/results/V8TestTypedefs.cpp
+++ b/Source/bindings/tests/results/V8TestTypedefs.cpp
@@ -196,8 +196,8 @@ static void uLongLongMethodTestInterfaceEmptyTypeSequenceArgMethodCallback(const
 static void testInterfaceOrTestInterfaceEmptyMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestTypedefs* impl = V8TestTypedefs::toNative(info.Holder());
-    RefPtr<TestInterfaceImplementation> result0;
-    RefPtr<TestInterfaceEmpty> result1;
+    RefPtr<TestInterfaceImplementation> result0 = nullptr;
+    RefPtr<TestInterfaceEmpty> result1 = nullptr;
     impl->testInterfaceOrTestInterfaceEmptyMethod(result0, result1);
     if (result0) {
         v8SetReturnValue(info, result0.release());