[nautilus] mime-actions: check for valid error before dereferencing

[Ernestas Kulik <ernestask src gnome org>]

commit 1e898de96648fa9cb12653ed129c7ed2b0c26c72
Author: Ernestas Kulik <ernestask gnome org>
Date:   Sat May 13 22:57:19 2017 +0300

    mime-actions: check for valid error before dereferencing
    
    After launching a URI, the code checks if the operation has been
    canceled, but does not check if the error pointer is valid.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781132

 src/nautilus-mime-actions.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/nautilus-mime-actions.c b/src/nautilus-mime-actions.c
index 2fc5320..ab69c60 100644
--- a/src/nautilus-mime-actions.c
+++ b/src/nautilus-mime-actions.c
@@ -1540,7 +1540,7 @@ on_launch_default_for_uri (GObject      *source_object,
     sandboxed = g_file_test ("/.flatpak-info", G_FILE_TEST_EXISTS);
 
     nautilus_launch_default_for_uri_finish (res, &error);
-    if (!sandboxed && error->code != G_IO_ERROR_CANCELLED)
+    if (!sandboxed && error != NULL && error->code != G_IO_ERROR_CANCELLED)
     {
         g_queue_push_tail (params->unhandled_uris, uri);
     }