normalize common filenames in VideoBackends/Null

Source/Core/VideoBackends/Null/NullVertexManager.cpp

@@ -0,0 +1,17 @@
+// Copyright 2015 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "VideoBackends/Null/NullVertexManager.h"
+
+namespace Null
+{
+VertexManager::VertexManager() = default;
+
+VertexManager::~VertexManager() = default;
+
+void VertexManager::DrawCurrentBatch(u32 base_index, u32 num_indices, u32 base_vertex)
+{
+}
+
+}  // namespace Null