[network-manager-applet] vpn: fix function arguments

[Thomas Haller <thaller src gnome org>]

commit b0e6dc394b210d3c30cab6cfa94d9f2e6744ac50
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Jun 3 16:26:03 2016 +0200

    vpn: fix function arguments
    
    It has no arguments, so use "void".
    
    https://bugzilla.gnome.org/show_bug.cgi?id=767208

 src/connection-editor/vpn-helpers.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/connection-editor/vpn-helpers.c b/src/connection-editor/vpn-helpers.c
index ecfc850..35823c7 100644
--- a/src/connection-editor/vpn-helpers.c
+++ b/src/connection-editor/vpn-helpers.c
@@ -46,7 +46,7 @@ _sort_vpn_plugins (NMVpnPluginInfo *aa, NMVpnPluginInfo *bb)
 }
 
 GSList *
-vpn_get_plugins ()
+vpn_get_plugins (void)
 {
        static gboolean plugins_loaded = FALSE;
        static GSList *plugins = NULL;