Go patch committed: Fix struct with pointer to array of struct

[Ian Lance Taylor]

This patch fixes code like

type S struct {
	a *A
}
type A [1024]S

in which a struct has a field which is a pointer to an array of the same
struct.  Previously the struct would be uninitialized when the array
type was created, and the array would get the wrong size.  Bootstrapped
and ran Go testsuite on x86_64-unknown-linux-gnu.  Committed to
mainline.

Ian

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