fix compile error on empty eventstream event (aws#2934)

DmitriyMusatkin · web-flow · commit 3a8b105be8d7 · 2024-04-22T14:12:38.000-07:00
diff --git a/tools/code-generation/generator/src/main/resources/com/amazonaws/util/awsclientgenerator/velocity/cpp/json/EventStreamHeader.vm b/tools/code-generation/generator/src/main/resources/com/amazonaws/util/awsclientgenerator/velocity/cpp/json/EventStreamHeader.vm
@@ -57,6 +57,8 @@ namespace Model
 #elseif($entry.value.shape.eventPayloadType.equals("structure") || $entry.value.shape.eventPayloadType.equals("list"))
        msg.InsertEventHeader(":content-type", Aws::String("application/json"));
        msg.WriteEventPayload(value.Jsonize().View().WriteCompact());
+#else
+       AWS_UNREFERENCED_PARAM(value);
 #end
 #else##if($entry.value.shape.eventPayloadType.equals("blob"))
        if(!value.Get$CppViewHelper.capitalizeFirstChar(${entry.value.shape.eventPayloadMemberName})().empty())
