Function write_u32

gguf-tools/deepseek4-quantize.c:1403–1405

    if (src->nbytes != (size_t)n * sizeof(int64_t)) die("bad I64 byte size");
    byte_buf out = { .size = (size_t)n * sizeof(int32_t), .data = xmalloc((size_t)n * sizeof(int32_t)) };
    int32_t *dst = (int32_t *)out.data;
    for (int64_t i = 0; i < n; i++) {
        int64_t v = load_i64_le(src->data + (size_t)i * 8);
        if (v < INT32_MIN || v > INT32_MAX) die("I64 value out of I32 range");
        dst[i] = (int32_t)v;
    }