change type for address family to "int"

Let's settle on a single type for all address family values, even if
UNIX is very inconsitent on the precise type otherwise. Given that
socket() is the primary entrypoint for the sockets API, and that uses
"int", and "int" is relatively simple and generic, we settle on "int"
for this.

src/libsystemd/sd-rtnl/local-addresses.h

@@ -29,8 +29,8 @@
 #include "in-addr-util.h"
 
 struct local_address {
-        int ifindex;
-        unsigned char family, scope;
+        int family, ifindex;
+        unsigned char scope;
         union in_addr_union address;
 };
 

src/libsystemd/sd-rtnl/rtnl-message.c

@@ -133,7 +133,7 @@ int sd_rtnl_message_route_set_scope(sd_rtnl_message *m, unsigned char scope) {
 }
 
 int sd_rtnl_message_new_route(sd_rtnl *rtnl, sd_rtnl_message **ret,
-                              uint16_t nlmsg_type, unsigned char rtm_family) {
+                              uint16_t nlmsg_type, int rtm_family) {
         struct rtmsg *rtm;
         int r;
 
@@ -275,7 +275,7 @@ int sd_rtnl_message_addr_set_scope(sd_rtnl_message *m, unsigned char scope) {
         return 0;
 }
 
-int sd_rtnl_message_addr_get_family(sd_rtnl_message *m, unsigned char *family) {
+int sd_rtnl_message_addr_get_family(sd_rtnl_message *m, int *family) {
         struct ifaddrmsg *ifa;
 
         assert_return(m, -EINVAL);
@@ -352,7 +352,7 @@ int sd_rtnl_message_addr_get_ifindex(sd_rtnl_message *m, int *ifindex) {
 
 int sd_rtnl_message_new_addr(sd_rtnl *rtnl, sd_rtnl_message **ret,
                              uint16_t nlmsg_type, int index,
-                             unsigned char family) {
+                             int family) {
         struct ifaddrmsg *ifa;
         int r;
 
@@ -383,7 +383,7 @@ int sd_rtnl_message_new_addr(sd_rtnl *rtnl, sd_rtnl_message **ret,
 }
 
 int sd_rtnl_message_new_addr_update(sd_rtnl *rtnl, sd_rtnl_message **ret,
-                             int index, unsigned char family) {
+                             int index, int family) {
         int r;
 
         r = sd_rtnl_message_new_addr(rtnl, ret, RTM_NEWADDR, index, family);

src/libsystemd/sd-rtnl/test-rtnl.c

@@ -334,8 +334,8 @@ static void test_get_addresses(sd_rtnl *rtnl) {
 
         for (m = reply; m; m = sd_rtnl_message_next(m)) {
                 uint16_t type;
-                unsigned char family, scope, flags;
-                int ifindex;
+                unsigned char scope, flags;
+                int family, ifindex;
 
                 assert_se(sd_rtnl_message_get_type(m, &type) >= 0);
                 assert_se(type == RTM_NEWADDR);