[nautilus] gnome-desktop: update upstream gnome-desktop-thumbnail-script

[Ernestas Kulik <ernestask src gnome org>]

commit 326fa60685f165ab74a09ac9c53f53a5b30fd66d
Author: daniel <daniel mohns posteo de>
Date:   Wed May 15 21:46:44 2019 +0200

    gnome-desktop: update upstream gnome-desktop-thumbnail-script
    
    Parity change for
    https://gitlab.gnome.org/GNOME/gnome-desktop/merge_requests/38

 src/gnome-desktop/gnome-desktop-thumbnail-script.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)
---
diff --git a/src/gnome-desktop/gnome-desktop-thumbnail-script.c 
b/src/gnome-desktop/gnome-desktop-thumbnail-script.c
index 8e8b87653..0aa26444a 100644
--- a/src/gnome-desktop/gnome-desktop-thumbnail-script.c
+++ b/src/gnome-desktop/gnome-desktop-thumbnail-script.c
@@ -149,7 +149,9 @@ get_extension (const char *path)
 
   basename = g_path_get_basename (path);
   p = strrchr (basename, '.');
-  if (p == NULL)
+  if (g_file_test (path, G_FILE_TEST_IS_DIR) ||
+      !p ||
+      p == basename) /* Leading periods on the basename are ignored. */
     return NULL;
   return g_strdup (p + 1);
 }
@@ -717,7 +719,10 @@ script_exec_free (ScriptExec *exec)
   g_free (exec->infile);
   if (exec->infile_tmp)
     {
-      g_unlink (exec->infile_tmp);
+      if (g_file_test (exec->infile_tmp, G_FILE_TEST_IS_DIR))
+        g_rmdir (exec->infile_tmp);
+      else
+        g_unlink (exec->infile_tmp);
       g_free (exec->infile_tmp);
     }
   if (exec->outfile)
@@ -795,7 +800,12 @@ script_exec_new (const char  *uri,
         }
       exec->outfile = g_build_filename (exec->outdir, "gnome-desktop-thumbnailer.png", NULL);
       ext = get_extension (exec->infile);
-      infile = g_strdup_printf ("gnome-desktop-file-to-thumbnail.%s", ext);
+
+      if (ext)
+        infile = g_strdup_printf ("gnome-desktop-file-to-thumbnail.%s", ext);
+      else
+        infile = g_strdup_printf ("gnome-desktop-file-to-thumbnail");
+
       exec->infile_tmp = g_build_filename (exec->outdir, infile, NULL);
 
       exec->s_infile = g_build_filename ("/tmp/", infile, NULL);