Cannot process normal maps

[srredfire]

Attempting to convert a normal map results in the error:

Type is VTF_LEGACY_RSRC_IMAGE
Resource to image error: Unsupported image format: IMAGE_FORMAT_LINEAR_BGRX8888

[rob5300]

I only added the required data for a few image formats, I will add more including this

[rob5300]

Please try the latest release (edited)
If you get weird results or errors please post the results here and the full program output.

I am not sure if LINEAR image formats will require additional changes to convert properly...