LinkType.LayerType() returns 0 for all types

[en-vee]

In the following snippet, the LinkType().LayerType() method always returns a value of 0 for all layer types. It should return type=1 for example, when the link type is "Ethernet" or 113 when the linkType of the pcapgo.Reader is "Linux Cooked SLL"

	pcapReader, err := pcapgo.NewReader(r)
	if err != nil {
		return "", err
	}
	layerType := pcapReader.LinkType().LayerType()

[en-vee]

I guess I can workaround by performing a type conversion of LinkType to LayerType as their underlying types are compatible. This works for me for now as I can pass this layerType to the NewPacketSource method when decoding individual packets.

	pcapReader, err := pcapgo.NewReader(r)
	if err != nil {
		return "", err
	}
	linkType := pcapReader.LinkType()
	layerType := gopacket.LayerType(linkType)