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eeshow/delta.c (sheet_eq): check if one sheet title is NULL
May have caused a segfault.
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@ -303,8 +303,12 @@ bool sheet_eq(const struct sheet *a, const struct sheet *b)
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if (!(a && b))
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return 0;
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if (a->title != b->title && strcmp(a->title, b->title))
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return 0;
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if (a->title != b->title) {
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if (!a->title || !b->title)
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return 0;
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if (strcmp(a->title, b->title))
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return 0;
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}
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obj_a = a->objs;
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obj_b = b->objs;
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