silence signed/unsigned comparision warning
(cherry picked from commit f38a398033)
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@@ -487,7 +487,7 @@ lwres_create_addr(const char *buffer, lwres_addr_t *addr, int convert_zero) {
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#ifdef HAVE_IF_NAMETOINDEX
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zone = if_nametoindex(percent);
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if (zone != 0) {
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if (zone != 0U) {
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addr->zone = zone;
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return (LWRES_R_SUCCESS);
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}
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