network: drop unnecessary initializations

src/network/netdev/wireguard.c

@@ -401,7 +401,7 @@ static void resolve_endpoints(NetDev *netdev) {
         WireguardPeer *peer;
         Wireguard *w;
         Iterator i;
-        int r = 0;
+        int r;
 
         assert(netdev);
         w = WIREGUARD(netdev);

src/network/networkd-dhcp4.c

@@ -542,7 +542,7 @@ static int dhcp_server_is_black_listed(Link *link, sd_dhcp_client *client) {
 
 static int dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
         Link *link = userdata;
-        int r = 0;
+        int r;
 
         assert(link);
         assert(link->network);

src/network/networkd-link.c

@@ -1333,7 +1333,7 @@ static int link_request_set_addresses(Link *link) {
 }
 
 static int link_set_bridge_vlan(Link *link) {
-        int r = 0;
+        int r;
 
         r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
         if (r < 0)

src/network/networkd-ndisc.c

@@ -559,7 +559,7 @@ static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
 
 static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
         uint64_t flags;
-        int r = 0;
+        int r;
 
         assert(link);
         assert(link->network);