[gvfs] network: Check variable before dereferencing

[Ondrej Holy <oholy src gnome org>]

commit d659151a1f8b74fc9fc82689d6710f876a6ba5db
Author: Ondrej Holy <oholy redhat com>
Date:   Wed Jan 25 13:28:25 2017 +0100

    network: Check variable before dereferencing
    
    It seems that the error variable may be NULL at this point in
    some cases as per the bug reports, but I don't really have any
    idea why. Let's check the error variable before dereferencing
    and see if it helps to reduce the number of bug reports...
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777737

 daemon/gvfsbackendnetwork.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/daemon/gvfsbackendnetwork.c b/daemon/gvfsbackendnetwork.c
index c6a103d..ad9d68e 100644
--- a/daemon/gvfsbackendnetwork.c
+++ b/daemon/gvfsbackendnetwork.c
@@ -359,7 +359,7 @@ recompute_files (GVfsBackendNetwork *backend)
             {
              char *uri = g_file_get_uri (server_file);
               g_debug ("Couldn't create directory monitor on %s. Error: %s\n",
-                        uri, error->message);
+                       uri, error ? error->message : "");
              g_free (uri);
               g_clear_error (&error);
             }