[nautilus] nautilus_file_peek_display_name: Don't return NULL

[Iain Lane <iainl src gnome org>]

commit 3fb7cff1a86d0a4ca48877ebcd8f27ef43a2edbd
Author: Iain Lane <iain orangesquash org uk>
Date:   Mon Oct 19 15:31:33 2015 +0100

    nautilus_file_peek_display_name: Don't return NULL
    
    If the name is the empty string then nautilus_file_set_display_name
    won't actually set the display name. In this case we were returning
    NULL from nautilus_file_peek_display_name, which some of our callers
    weren't prepared to handle. This led to crashes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=700507

 libnautilus-private/nautilus-file.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/libnautilus-private/nautilus-file.c b/libnautilus-private/nautilus-file.c
index 193edcb..eff26dc 100644
--- a/libnautilus-private/nautilus-file.c
+++ b/libnautilus-private/nautilus-file.c
@@ -3742,8 +3742,9 @@ nautilus_file_peek_display_name (NautilusFile *file)
                        g_free (escaped_name);
                }
        }
-       
-       return eel_ref_str_peek (file->details->display_name);
+
+       return file->details->display_name ?
+               eel_ref_str_peek (file->details->display_name) : "";
 }
 
 char *