Using Do Not Create Material in FBX import settings seems to result in only one Material Slot

The licensee reported the following on this issue.

The problem seems to be that the comparison below is not working properly. If the Material is not created, it will be a comparison between WorldGridMaterials, resulting in an incorrect branch.
.\Engine\Source\Editor\UnrealEd\Private\Fbx\FbxStaticMeshImport.cpp
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I think that the intended operation will be obtained by adding the condition of Slot name as follows.

&& StaticMeshMaterial.MaterialSlotName == CandidateMaterial.MaterialSlotName

1. Import the attached FBX.
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2. Enable ImportMeshLODs and set Create New Materials.
3. When imported, Slots are Red and Green.
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4. Enable ImportMeshLODs and set Do Not Create Material.
5. After importing, Slot will be Red only.
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[UE-23848] Bug Status

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