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vlan-util: add assertions to parse_vlanid()
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@ -9,6 +9,9 @@ int parse_vlanid(const char *p, uint16_t *ret) {
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uint16_t id;
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int r;
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assert(p);
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assert(ret);
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r = safe_atou16(p, &id);
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if (r < 0)
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return r;
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