Incorrect type for repeated child elements when generating compact types

[meblum]

Running xmlstruct.WithCompactTypes(true) on <a><b><c></c><c></c></b></a> generates

type A struct {
        C struct{} `xml:"b>c"`
}

instead of

type A struct {
        C []struct{} `xml:"b>c"`
}

This was missed due to an incorrect test case on line 706 where struct{} should've been []struct{}.

go-xmlstruct/generator_test.go

Line 706 in dac321d

"\tG struct{} `xml:\"f>g\"`",