[gthumb] image wall: use the browser location only if it's a real directory

[Paolo Bacchilega <paobac src gnome org>]

commit 0635dc3e707698d73c1fffab9987bd7a71ef8b13
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Tue Jan 8 17:27:12 2019 +0100

    image wall: use the browser location only if it's a real directory

 extensions/contact_sheet/dlg-image-wall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/extensions/contact_sheet/dlg-image-wall.c b/extensions/contact_sheet/dlg-image-wall.c
index 4df354fa..67634af4 100644
--- a/extensions/contact_sheet/dlg-image-wall.c
+++ b/extensions/contact_sheet/dlg-image-wall.c
@@ -260,7 +260,7 @@ dlg_image_wall (GthBrowser *browser,
        /* Set widgets data. */
 
        location = gth_browser_get_location (data->browser);
-       if (location != NULL)
+       if ((location != NULL) && g_file_has_uri_scheme (location, "file"))
                s_value = g_file_get_uri (location);
        else
                s_value = _g_settings_get_uri (data->settings, PREF_IMAGE_WALL_DESTINATION);