[gnome-control-center] Fix the style of main()'s prototype

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 8201c369a2199c5e8492d621f7766b6267f0b2bc
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Mon Nov 26 15:19:36 2018 +0100

    Fix the style of main()'s prototype

 shell/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/shell/main.c b/shell/main.c
index d323582d3..29b99cd2f 100644
--- a/shell/main.c
+++ b/shell/main.c
@@ -36,7 +36,8 @@
 #include "cc-application.h"
 
 int
-main (int argc, char **argv)
+main (gint    argc,
+      gchar **argv)
 {
   g_autoptr(GtkApplication) application = NULL;