[network-manager-applet/bg/secrets-refcount] applet: fix reference count for secret request result

[Beniamino Galvani <bgalvani src gnome org>]

commit e27ca5486a670b15c4a0e33698bf523b229bfb67
Author: Beniamino Galvani <bgalvani redhat com>
Date:   Sat Feb 29 18:02:50 2020 +0100

    applet: fix reference count for secret request result
    
    Don't pass a floating variant to the callback function but convert it
    into a full one so that we can guarantee that the callback function
    will not assume ownership.
    
      (nm-applet:691510): GLib-CRITICAL **: 18:02:29.581: g_atomic_ref_count_dec: assertion 'g_atomic_int_get 
(arc) > 0' failed
    
      _g_log_abort () at /lib64/libglib-2.0.so.0
      g_logv () at /lib64/libglib-2.0.so.0
      g_log () at /lib64/libglib-2.0.so.0
      g_atomic_ref_count_dec () at /lib64/libglib-2.0.so.0
      g_variant_unref () at /lib64/libglib-2.0.so.0
      gs_local_variant_unref (v=<synthetic pointer>) at ./shared/nm-utils/gsystem-local-alloc.h:73
      complete_request (info=info@entry=0xaaf340) at src/applet-vpn-request.c:273
      external_ui_from_child_response (error=0x7fffffffd380, info=<optimized out>) at 
src/applet-vpn-request.c:261
      process_child_response (info=<optimized out>) at src/applet-vpn-request.c:298
      g_child_watch_dispatch () at /lib64/libglib-2.0.so.0
      g_main_context_dispatch () at /lib64/libglib-2.0.so.0
      ...

 src/applet-vpn-request.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/applet-vpn-request.c b/src/applet-vpn-request.c
index 07a71fce..91368f92 100644
--- a/src/applet-vpn-request.c
+++ b/src/applet-vpn-request.c
@@ -281,7 +281,7 @@ complete_request (VpnSecretsInfo *info)
        g_variant_builder_add (&settings_builder, "{sa{sv}}",
                               NM_SETTING_VPN_SETTING_NAME,
                               &vpn_builder);
-       settings = g_variant_builder_end (&settings_builder);
+       settings = g_variant_ref_sink (g_variant_builder_end (&settings_builder));
 
        applet_secrets_request_complete (req, settings, NULL);
        applet_secrets_request_free (req);