[network-manager-iodine] properties: avoid double initialization of error

[Beniamino Galvani <bgalvani src gnome org>]

commit 215a60829eb8871d2e5b312e256c09085dd8301c
Author: Beniamino Galvani <bgalvani redhat com>
Date:   Wed Feb 14 14:09:41 2018 +0100

    properties: avoid double initialization of error
    
    Fixes the following runtime error:
    
     (nm-connection-editor:22122): GLib-WARNING **: GError set over the
     top of a previous GError or uninitialized memory.
     This indicates a bug in someone's code. You must ensure an error is
     NULL before it's set.
     The overwriting error message was: does not look like a Iodine DNS
     Tunnel VPN connection (parse failed)

 properties/nm-iodine.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/properties/nm-iodine.c b/properties/nm-iodine.c
index a0a51de..50e4036 100644
--- a/properties/nm-iodine.c
+++ b/properties/nm-iodine.c
@@ -129,7 +129,7 @@ import (NMVpnEditorPlugin *iface, const char *path, GError **error)
        keyfile = g_key_file_new ();
        flags = G_KEY_FILE_KEEP_COMMENTS | G_KEY_FILE_KEEP_TRANSLATIONS;
 
-       if (!g_key_file_load_from_file (keyfile, path, flags, error)) {
+       if (!g_key_file_load_from_file (keyfile, path, flags, NULL)) {
                g_set_error (error,
                             NM_IODINE_IMPORT_EXPORT_ERROR,
                             NM_IODINE_IMPORT_EXPORT_ERROR_NOT_IODINE,