[nautilus] list-view: don't crash when expanding a directory

[Cosimo Cecchi <cosimoc src gnome org>]

commit 6f32b42280654bee7fb8d23c6ea9e21fefb374cb
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Sun Aug 4 23:29:10 2013 +0200

    list-view: don't crash when expanding a directory
    
    We need to check for file != NULL, which is true in the case we just
    started expanding the directory.

 src/nautilus-list-view.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/nautilus-list-view.c b/src/nautilus-list-view.c
index f81682b..ff3c698 100644
--- a/src/nautilus-list-view.c
+++ b/src/nautilus-list-view.c
@@ -1774,6 +1774,13 @@ location_cell_data_func (GtkTreeViewColumn *column,
                            NAUTILUS_LIST_MODEL_FILE_COLUMN, &file,
                            -1);
 
+       /* The file might be NULL if we just toggled an expander
+        * and we're still loading the subdirectory.
+        */
+       if (file == NULL) {
+               return;
+       }
+
        if (show_trash_orig && nautilus_file_is_in_trash (file)) {
                NautilusFile *orig_file;