Unmarshaling arrays panics

[x-hgg-x]

Describe the bug
Unmarshaling panics:

panic: reflect.MakeSlice of non-slice type

goroutine 1 [running]:
reflect.MakeSlice(0x566460, 0x513e20, 0x4, 0x4, 0x4ead48, 0x510560, 0x8)
        /usr/local/go/src/reflect/value.go:2256 +0x1d8
github.com/pelletier/go-toml.(*Decoder).valueFromOtherSlice(0xc00011ff10, 0x566460, 0x513e20, 0xc000022240, 0x4, 0x4, 0xc00011f838, 0xc00011f6a0, 0x4c99b3, 0xc0001101e0, ...)
        /projects/go-toml/marshal.go:786 +0x5f
github.com/pelletier/go-toml.(*Decoder).valueFromToml(0xc00011ff10, 0x566460, 0x513e20, 0x50dee0, 0xc00000c260, 0xc00000c280, 0x191, 0x0, 0x0, 0xc000014200, ...)
        /projects/go-toml/marshal.go:856 +0x527
github.com/pelletier/go-toml.(*Decoder).valueFromTree(0xc00011ff10, 0x566460, 0x51c080, 0xc000068480, 0xc00011fe10, 0x199, 0xc00005c2a0, 0x0, 0xc00011fdb0, 0x4f2dba)
        /projects/go-toml/marshal.go:694 +0x1174
github.com/pelletier/go-toml.(*Decoder).unmarshal(0xc00011ff10, 0x50a900, 0xc0000141f8, 0xc000068480, 0x0)
        /projects/go-toml/marshal.go:638 +0x275
github.com/pelletier/go-toml.(*Tree).Unmarshal(...)
        /projects/go-toml/marshal.go:525
main.main()
        /projects/go-toml/cmd/example/main.go:18 +0x13f

To Reproduce

type element struct {
	Color [4]uint8
}

tree, _ := toml.Load(`color = [1,2,3,4]`)

var e element
err := tree.Unmarshal(&e)
if err != nil {
	fmt.Println("unmarshal error:", err)
}

Expected behavior
There should be no panic.

Versions

• go-toml: last version of master (2b8e33f)
• go: 1.14
• operating system: Linux

Additional context
None.