[recipes] Avoid an error during exporting recipes without images

[Matthias Clasen <matthiasc src gnome org>]

commit 4db38fcc0d8e1d4c7d5a7c37e178894e5b38cc84
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jan 16 22:11:38 2017 -0500

    Avoid an error during exporting recipes without images
    
    We were not careful enough when handling empty image paths.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777306

 src/gr-recipe-exporter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gr-recipe-exporter.c b/src/gr-recipe-exporter.c
index 474fe7b..a8c9e3a 100644
--- a/src/gr-recipe-exporter.c
+++ b/src/gr-recipe-exporter.c
@@ -279,7 +279,7 @@ export_one_chef (GrRecipeExporter  *exporter,
         fullname = gr_chef_get_fullname (chef);
         description = gr_chef_get_description (chef);
         image_path = gr_chef_get_image (chef);
-        if (image_path) {
+        if (image_path && image_path[0]) {
                 g_autoptr(GFile) source = NULL;
                 g_autoptr(GFile) dest = NULL;
                 g_autofree char *basename = NULL;