[gtk+/gtk-3-16] placessidebar: do not crash if uris is NULL

[Dominique Leuenberger <dleuen src gnome org>]

commit d90e9e40588916dad8f5ad29c49a68398e8c5faa
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Thu Oct 29 13:56:18 2015 +0100

    placessidebar: do not crash if uris is NULL
    
    On Drag'n'Drop actions across system boundaries (VM host to guest), the
    happen to be null.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757298

 gtk/gtkplacessidebar.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkplacessidebar.c b/gtk/gtkplacessidebar.c
index b8d01c7..8c9eeae 100644
--- a/gtk/gtkplacessidebar.c
+++ b/gtk/gtkplacessidebar.c
@@ -1883,7 +1883,7 @@ build_file_list_from_uris (const gchar **uris)
   gint i;
 
   result = NULL;
-  for (i = 0; uris[i]; i++)
+  for (i = 0; uris && uris[i]; i++)
     {
       GFile *file;