[recipes] Avoid a crash for missing chef images

[Matthias Clasen <matthiasc src gnome org>]

commit 6500e00e709631a4c5bd31ca9cf4b3b561ac49b4
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat May 27 11:54:14 2017 -0400

    Avoid a crash for missing chef images
    
    We should have a placeholder image, but not having one
    is not an excuse for crashing.

 src/gr-image.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/gr-image.c b/src/gr-image.c
index 6c62d48..1f12815 100644
--- a/src/gr-image.c
+++ b/src/gr-image.c
@@ -423,6 +423,11 @@ gr_image_load_full (GrImage         *ri,
          * We used to store them as a relative path starting with images/,
          * so try that case as well.
          */
+        if (ri->path == NULL) {
+                g_warning ("No image path");
+                return;
+        }
+
         if (ri->path[0] == '/')
                 local_path = g_strdup (ri->path);
         else if (g_str_has_prefix (ri->path, "images/"))