[libepc] gtk4: Adapt calls to gtk_init() and gtk_init_check().

[Murray Cumming <murrayc src gnome org>]

commit 24299ddf3a9e6499c22178bca8bd3b48ccefd857
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Mar 17 21:42:42 2017 +0100

    gtk4: Adapt calls to gtk_init() and gtk_init_check().

 examples/publisher-ui.c       |    2 +-
 examples/server-credentials.c |    2 +-
 tests/test-progress-hooks.c   |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/examples/publisher-ui.c b/examples/publisher-ui.c
index 807e90c..c794a47 100644
--- a/examples/publisher-ui.c
+++ b/examples/publisher-ui.c
@@ -778,7 +778,7 @@ main (int   argc,
 
   g_set_application_name ("Easy Publisher Example");
 
-  gtk_init (&argc, &argv);
+  gtk_init ();
 
   builder = gtk_builder_new ();
   load_ui (argv[0]);
diff --git a/examples/server-credentials.c b/examples/server-credentials.c
index 8f0efc2..f11c387 100644
--- a/examples/server-credentials.c
+++ b/examples/server-credentials.c
@@ -19,7 +19,7 @@ main (int   argc,
   /* Initialize GTK+ and gnutls
    */
   gnutls_global_init ();
-  gtk_init (&argc, &argv);
+  gtk_init ();
 
   /* Show a progress window when generating new keys.
    */
diff --git a/tests/test-progress-hooks.c b/tests/test-progress-hooks.c
index e69c70d..82e96dd 100644
--- a/tests/test-progress-hooks.c
+++ b/tests/test-progress-hooks.c
@@ -143,7 +143,7 @@ main (int   argc,
             break;
 
           case 3:
-            if (!gtk_init_check (&argc, &argv))
+            if (!gtk_init_check ())
               {
                 g_warning ("Cannot initialize UI");
                 continue;