[gegl] process: properly initialzie GeglGraphTraversal::path

[N/A <ell src gnome org>]

commit 18346c8b37625ad5461fe2b3bb61c6b8a2d10c9b
Author: Ell <ell_se yahoo com>
Date:   Sun Nov 12 10:32:02 2017 -0500

    process: properly initialzie GeglGraphTraversal::path

 gegl/process/gegl-graph-traversal.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gegl/process/gegl-graph-traversal.c b/gegl/process/gegl-graph-traversal.c
index 6b6cc03..22c4c5a 100644
--- a/gegl/process/gegl-graph-traversal.c
+++ b/gegl/process/gegl-graph-traversal.c
@@ -111,6 +111,8 @@ gegl_graph_build (GeglNode *node)
 {
   GeglGraphTraversal *result = g_new0 (GeglGraphTraversal, 1);
 
+  g_queue_init (&result->path);
+
   _gegl_graph_do_build (result, node);
 
   return result;