message: Bring back initialization of DummyMorphTarget.
  This fixes "uninitialized texture" warnings from the Vulkan backend
  when viewing Littlest Tokyo in a debug build.
diff: @@ -278,6 +278,11 @@ void FEngine::init() {
  // Create a dummy morph target buffer.
  mDummyMorphTargetBuffer = createMorphTargetBuffer(FMorphTargetBuffer::EmptyMorphTargetBuilder());
  + float3 dummyPositions[1] = {};
  + short4 dummyTangents[1] = {};
  + mDummyMorphTargetBuffer->setPositionsAt(*this, 0, dummyPositions, 1, 0);
  + mDummyMorphTargetBuffer->setTangentsAt(*this, 0, dummyTangents, 1, 0);
  +
  // create dummy textures we need throughout the engine
  mDummyOneTexture = driverApi.createTexture(SamplerType::SAMPLER_2D, 1,
  