[gimp] app: add missing NULL in call to gimp_directory_file()

[Ell <ell src gnome org>]

commit e30a24273da29cb9576145919ec5469d4d229624
Author: Ell <ell_se yahoo com>
Date:   Sun Sep 22 17:34:40 2019 +0300

    app: add missing NULL in call to gimp_directory_file()

 app/dialogs/preferences-dialog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/dialogs/preferences-dialog.c b/app/dialogs/preferences-dialog.c
index 246d72c2b7..df5beeddcd 100644
--- a/app/dialogs/preferences-dialog.c
+++ b/app/dialogs/preferences-dialog.c
@@ -1312,7 +1312,7 @@ prefs_dialog_new (Gimp       *gimp,
     GFile        *file;
     gint          row = 0;
 
-    file = gimp_directory_file ("profilerc");
+    file = gimp_directory_file ("profilerc", NULL);
     store = gimp_color_profile_store_new (file);
     g_object_unref (file);