[Nickle] initializers bug

[Bart Massey]

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Here's a twisty case.  Error output is


->     dtree d = { node = { attr = 0, neg = &neg, pos = &pos } };
/tmp/dtx.5c:25: Incompatible types, storage '*dtree', value '*dtree', for initializer
->     dtree d = { node = { attr = 0, neg = &neg, pos = &pos } };
/tmp/dtx.5c:25: Incompatible types, storage '*dtree', value '*dtree', for initializer


Simpler examples seem not to have the problem.

	Bart


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typedef struct {
    int pos, neg;
} mixed_leaf;

typedef union {
    void empty;
    int pos, neg;
    mixed_leaf mixed;
} dtree_leaf;

typedef dtree;

typedef struct {
    int attr;
    *dtree pos, neg;
} dtree_node;

typedef union {
    dtree_leaf leaf;
    dtree_node node;
} dtree;

dtree neg = {leaf = {empty = <>}};
dtree pos = {leaf = {empty = <>}};
dtree d = {node = {attr = 0, neg = &neg, pos = &pos}};

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