[gnome-terminal] build: Suppress a warning about ignored returned value

[Egmont Koblinger <egmontkob src gnome org>]

commit 06c277694cefbda35dce9265b29c74e7635171cd
Author: Egmont Koblinger <egmont gmail com>
Date:   Sat Sep 14 22:04:18 2019 +0200

    build: Suppress a warning about ignored returned value
    
    https://gitlab.gnome.org/GNOME/vte/issues/167

 src/server.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/server.c b/src/server.c
index b43d4082..87a6cd90 100644
--- a/src/server.c
+++ b/src/server.c
@@ -141,7 +141,10 @@ init_server (int argc,
    */
   const char *home_dir = g_get_home_dir ();
   if (home_dir == NULL || chdir (home_dir) < 0)
-    (void) chdir ("/");
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-result"
+    chdir ("/");
+#pragma GCC diagnostic pop
 
   g_set_prgname ("gnome-terminal-server");
   g_set_application_name (_("Terminal"));