UpConvertTypes may return invalid values

[dcferreira]

I'm testing the implementation of the get function, and it doesn't seem to work.
It fails in flows/record.go, because UpConvertTypes returns (what fmt prints as) <bad>.

This happens here:

go-flows/flows/record.go

Lines 290 to 291 in b044915

	ie.Type = UpConvertTypes(init[argumentPos[0]].ie.Type, init[argumentPos[1]].ie.Type)
	ie.Length = ipfix.DefaultSize[ie.Type]

and then there's an index out of range error, since ie.Type isn't a valid index in ipfix.DefaultSize.

Since I don't understand what this if chain is comparing (and I see some exceptions for select/map/apply in other places), it might also be that the get/slice functions require some changes here.

[dcferreira]

Update: the feature in question is {"get": [0, "__label"]}.