[nautilus/wip/oholy/properties-window-critical-fix: 2/3] properties-window: Fix crashes when opened multiple times

[Ondrej Holy <oholy src gnome org>]

commit c4b567936ebbba8479f6641c89b3980f7963b765
Author: Ondrej Holy <oholy redhat com>
Date:   Thu Sep 26 11:07:35 2019 +0200

    properties-window: Fix crashes when opened multiple times
    
    Nautilus crashes with segmentation fault when closing the properties dialog
    after it has been opened mutliple times for the same file. This can't be
    reproduced over Nautilus as it uses modal dialogs, however, it can be simply
    reproduced over the Desktop Icons extension. Let's check the pending_key
    variable before used to be sure it is not NULL to fix this crashes.

 src/nautilus-properties-window.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/nautilus-properties-window.c b/src/nautilus-properties-window.c
index 0112aeb3c..f6b2f21a6 100644
--- a/src/nautilus-properties-window.c
+++ b/src/nautilus-properties-window.c
@@ -5297,7 +5297,10 @@ remove_pending (StartupData *startup_data,
         eel_timed_wait_stop
             (cancel_create_properties_window_callback, startup_data);
     }
-    g_hash_table_remove (pending_lists, startup_data->pending_key);
+    if (startup_data->pending_key != NULL)
+    {
+        g_hash_table_remove (pending_lists, startup_data->pending_key);
+    }
 }
 
 static gboolean