check in toml program, doesn't work yet

Useless error is useless ...

$ ./sprok-toml example.toml
panic: reflect: slice index out of range

goroutine 16 [running]:
runtime.panic(0x4ca560, 0xc208036890)
        /usr/lib/go/src/pkg/runtime/panic.c:279 +0xf5
reflect.Value.Index(0x4c3c40, 0xc20801a2d8, 0x0, 0x176, 0x1, 0x0, 0x0,
0x0, 0x0)
        /usr/lib/go/src/pkg/reflect/value.go:1008 +0x316
github.com/BurntSushi/toml.(*MetaData).unifySliceArray(0xc20801b9f0,
0x4c3640, 0xc20800e0e0, 0x0, 0x172, 0x4c3c40, 0xc20801a2d8, 0x0, 0x176,
0x0, ...)
        /home/atobey/.go/src/github.com/BurntSushi/toml/decode.go:321
+0x175
github.com/BurntSushi/toml.(*MetaData).unifySlice(0xc20801b9f0,
0x4c3640, 0xc20800e0e0, 0x4c3c40, 0xc20801a2d8, 0x0, 0x176, 0x0, 0x0)
        /home/atobey/.go/src/github.com/BurntSushi/toml/decode.go:314
+0x2ec
github.com/BurntSushi/toml.(*MetaData).unify(0xc20801b9f0, 0x4c3640,
0xc20800e0e0, 0x4c3c40, 0xc20801a2d8, 0x0, 0x176, 0x0, 0x0)