Fix crash in UE 5.1.1 when importing new texture (#2)

This fixes issue benui-dev#4
by checking for pre-existing settings instead of trying to get a valid
Texture Factory. Because it would likely require bigger changes if it's
to work with the Interchange plugin. We check if the texture already has
some settings that aren't valid and if so set the default (first)
setting for each.

Source/BUIValidator/Private/BUIValidatorModule.cpp

@@ -57,29 +57,25 @@ void FBUIValidatorModule::OnObjectReimported( UFactory* ImportFactory, UObject*
 		return;
 
 	// Only apply defaults to newly-imported assets
-	UTextureFactory* TextureFactory = Cast<UTextureFactory>( ImportFactory );
-	if ( !TextureFactory->bUsingExistingSettings )
+	const UBUIValidatorSettings& ValidatorSettings = *GetDefault<UBUIValidatorSettings>();
+	for ( const auto& Group : ValidatorSettings.ValidationGroups )
 	{
-		const UBUIValidatorSettings& ValidatorSettings = *GetDefault<UBUIValidatorSettings>();
-		for ( const auto& Group : ValidatorSettings.ValidationGroups )
+		if ( Group.bApplyOnImport
+			&& Group.ShouldGroupValidateAsset( InObject ) )
 		{
-			if ( Group.bApplyOnImport
-				&& Group.ShouldGroupValidateAsset( InObject ) )
+			if ( Group.ValidationRule.TextureGroups.Num() > 0 && !Group.ValidationRule.TextureGroups.Contains( Texture->LODGroup ) )
 			{
-				if ( Group.ValidationRule.TextureGroups.Num() > 0 )
-				{
-					Texture->LODGroup = Group.ValidationRule.TextureGroups[ 0 ];
-				}
-
-				if ( Group.ValidationRule.CompressionSettings.Num() > 0 )
-				{
-					Texture->CompressionSettings = Group.ValidationRule.CompressionSettings[ 0 ];
-				}
-
-				if ( Group.ValidationRule.MipGenSettings.Num() > 0 )
-				{
-					Texture->MipGenSettings = Group.ValidationRule.MipGenSettings[ 0 ];
-				}
+				Texture->LODGroup = Group.ValidationRule.TextureGroups[ 0 ];
+			}
+
+			if ( Group.ValidationRule.CompressionSettings.Num() > 0 && !Group.ValidationRule.CompressionSettings.Contains( Texture->CompressionSettings ) )
+			{
+				Texture->CompressionSettings = Group.ValidationRule.CompressionSettings[ 0 ];
+			}
+
+			if ( Group.ValidationRule.MipGenSettings.Num() > 0 && !Group.ValidationRule.MipGenSettings.Contains( Texture->MipGenSettings ))
+			{
+				Texture->MipGenSettings = Group.ValidationRule.MipGenSettings[ 0 ];
 			}
 		}
 	}