[CRASH] when trying to initialise multi-dimension struct value

[Oldes]

Currently:

>> make struct! [a: [int8! [2]] [1 1]]
== make struct! [a: [int8! [2]] [1 1]] ;; OK

>> make struct! [a: [int8! [2]] "a"] ;; Error is also OK... (although there is `none` instead of `string!`)

** Script error: expected block! not none
** Where: make
** Near: make struct! [a: [int8! [2]] "a"]

>> make struct! [a: [int8! [2]] ["a" "a"]] ;; Error is also OK...

** Script error: string! type is not allowed here
** Where: make
** Near: make struct! [a: [int8! [2]] ["a" "a"]]

>> make struct! [a: [int8! [2]] 1] ;; CRASH - should not happen!