net: Fix do_set_link() return type

do_set_link() returns int, but Monitor handler functions should
always return void.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
Message-Id: 

net.c

@@ -2905,7 +2905,7 @@ void do_info_network(Monitor *mon)
     }
 }
 
-int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
+void do_set_link(Monitor *mon, const char *name, const char *up_or_down)
 {
     VLANState *vlan;
     VLANClientState *vc = NULL;
@@ -2918,7 +2918,7 @@ done:
 
     if (!vc) {
         monitor_printf(mon, "could not find network device '%s'", name);
-        return 0;
+        return;
     }
 
     if (strcmp(up_or_down, "up") == 0)
@@ -2931,8 +2931,6 @@ done:
 
     if (vc->link_status_changed)
         vc->link_status_changed(vc);
-
-    return 1;
 }
 
 void net_cleanup(void)

net.h

@@ -79,7 +79,7 @@ void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
 void qemu_handler_true(void *opaque);
 
 void do_info_network(Monitor *mon);
-int do_set_link(Monitor *mon, const char *name, const char *up_or_down);
+void do_set_link(Monitor *mon, const char *name, const char *up_or_down);
 
 void do_info_usernet(Monitor *mon);