[gnome-control-center/wip/hadess/fix-nm-1.22-build: 2/2] network: Fix missing prototype error

[Bastien Nocera <hadess src gnome org>]

commit 806c132c4f780f6672d024468e905f8124da12ef
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Sep 16 14:33:51 2020 +0200

    network: Fix missing prototype error
    
    gnome-control-center/panels/network/net-device-wifi.c:1179:1: warning: no previous prototype for 
‘nm_client_on_permission_change’ [-Wmissing-prototypes]
     1179 | nm_client_on_permission_change (NetDeviceWifi *self) {
          | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 panels/network/net-device-wifi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/panels/network/net-device-wifi.c b/panels/network/net-device-wifi.c
index 2d3677805..ff5fe8a35 100644
--- a/panels/network/net-device-wifi.c
+++ b/panels/network/net-device-wifi.c
@@ -1175,7 +1175,7 @@ net_device_wifi_init (NetDeviceWifi *self)
 }
 
 
-void
+static void
 nm_client_on_permission_change (NetDeviceWifi *self) {
         NMClientPermissionResult perm;
         NMDeviceWifiCapabilities caps;