[gupnp] gupnp-network-manager: Use void when declaring function

[Debarshi Ray <debarshir src gnome org>]

commit eb768a8af5ed1b37d870150d19510db0861539eb
Author: Olivier Crête <olivier crete collabora com>
Date:   Tue Jun 16 13:42:10 2015 -0400

    gupnp-network-manager: Use void when declaring function
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741257

 libgupnp/gupnp-network-manager.c |    2 +-
 libgupnp/gupnp-network-manager.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/libgupnp/gupnp-network-manager.c b/libgupnp/gupnp-network-manager.c
index 1111268..6e01e96 100644
--- a/libgupnp/gupnp-network-manager.c
+++ b/libgupnp/gupnp-network-manager.c
@@ -744,7 +744,7 @@ gupnp_network_manager_class_init (GUPnPNetworkManagerClass *klass)
 }
 
 gboolean
-gupnp_network_manager_is_available ()
+gupnp_network_manager_is_available (void)
 {
         GDBusProxy *dbus_proxy;
         GVariant *ret_values;
diff --git a/libgupnp/gupnp-network-manager.h b/libgupnp/gupnp-network-manager.h
index 27dbdec..8b87707 100644
--- a/libgupnp/gupnp-network-manager.h
+++ b/libgupnp/gupnp-network-manager.h
@@ -70,7 +70,7 @@ typedef struct {
 } GUPnPNetworkManagerClass;
 
 G_GNUC_INTERNAL gboolean
-gupnp_network_manager_is_available                      ();
+gupnp_network_manager_is_available                      (void);
 
 G_END_DECLS