fix incorrect parameter name in internal netlink.h RTA_OK macro

the wrong name works only by accident.

src/network/netlink.h

@@ -86,7 +86,7 @@ struct ifaddrmsg {
 #define RTA_DATALEN(rta)	((rta)->rta_len-sizeof(struct rtattr))
 #define RTA_DATAEND(rta)	((char*)(rta)+(rta)->rta_len)
 #define RTA_NEXT(rta)		(struct rtattr*)((char*)(rta)+NETLINK_ALIGN((rta)->rta_len))
-#define RTA_OK(nlh,end)		((char*)(end)-(char*)(rta) >= sizeof(struct rtattr))
+#define RTA_OK(rta,end)		((char*)(end)-(char*)(rta) >= sizeof(struct rtattr))
 
 #define NLMSG_RTA(nlh,len)	((void*)((char*)(nlh)+sizeof(struct nlmsghdr)+NETLINK_ALIGN(len)))
 #define NLMSG_RTAOK(rta,nlh)	RTA_OK(rta,NLMSG_DATAEND(nlh))