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c1361fc42dnetif: fix compilation warning in QueryDefaultGatewayImpl() (MarcoFalke) Pull request description: ``` src/common/netif.cpp:137:51: error: comparison of integers of different signs: 'int64_t' (aka 'long') and 'unsigned long' [-Werror,-Wsign-compare] 137 | for (nlmsghdr* hdr = (nlmsghdr*)response; NLMSG_OK(hdr, recv_result); hdr = NLMSG_NEXT(hdr, recv_result)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/netlink/netlink.h:220:31: note: expanded from macro 'NLMSG_OK' 220 | #define NLMSG_OK(_hdr, _len) NL_ITEM_OK(_hdr, _len, NLMSG_HDRLEN, _NLMSG_LEN) | ^ ~~~~ ~~~~~~~~~~~~ /usr/include/netlink/netlink.h:203:10: note: expanded from macro 'NL_ITEM_OK' 203 | ((_len) >= _hlen && _LEN_M(_ptr) >= _hlen && _LEN_M(_ptr) <= (_len)) | ~~~~ ^ ~~~~~ 1 error generated. ``` Happens on FreeBSD 15.0, with the default compiler (Clang 19). On FreeBSD 14, `/usr/include/netlink/netlink.h` contains: ``` #define NLMSG_HDRLEN ((int)sizeof(struct nlmsghdr)) ``` On FreeBSD 15, `/usr/include/netlink/netlink.h` contains: ``` #define NLMSG_HDRLEN (sizeof(struct nlmsghdr)) ``` ACKs for top commit: maflcko: lgtm ACKc1361fc42dhebasto: ACKc1361fc42d. Tree-SHA512: f8f00e2106fdf91550ab388a65bb8408fcf8c4557da9614e2e1dd90e70fc010dff72bfabbbec4315335afdedb546f7b554f5c98133c5aa1d3077c5641d94b956