🐛 Fix SIGSERV when RawSpec is nil (due to anonymous struct)

[rkettelerij]

This is the same PR as #892 but that one was automatically closed. This time testdata is included as requested so I'm hoping to get this merged.

From the original PR:

Under some circumstances RawSpec can be nil. I've encountred this when generating a CRD of a complex set of structs. Currently the structToSchema func fails hard on this (SIGSERV). This PR fixes the latter.

[k8s-ci-robot]

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Hi @rkettelerij. Thanks for your PR.

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[chrischdi]

/ok-to-test

[rkettelerij]

Apparently this was also reported before in #340 and #415 but never merged due to staleness.

[chrischdi]

But this would allow embedded structs / anonymous structs, which does not seem to be allowed according to the error below?

Shouldn't this then be:

Suggested change

	if ctx.info.RawSpec != nil && ctx.info.RawSpec.Type != structType {
	if ctx.info.RawSpec == nil || ctx.info.RawSpec.Type != structType {