[gegl] gegl-path: fix a crash for line-to only paths

[Øyvind Kolås <ok src gnome org>]

commit 07ff1efa55c388ac29b041fadb5a8c615492a00e
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Apr 5 19:43:07 2016 +0200

    gegl-path: fix a crash for line-to only paths

 gegl/property-types/gegl-path.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gegl/property-types/gegl-path.c b/gegl/property-types/gegl-path.c
index 622a0c7..76a67e9 100644
--- a/gegl/property-types/gegl-path.c
+++ b/gegl/property-types/gegl-path.c
@@ -896,7 +896,7 @@ gegl_path_append (GeglPath *self,
 
       x0 = iter->d.point[0].x;
       y0 = iter->d.point[0].y;
-      for (iter2=priv->path;iter2 && iter2->next != iter;iter2=iter2->next);
+      for (iter2=priv->path;iter2 && iter2->next != iter && iter2->next;iter2=iter2->next);
       x1 = iter2->d.point[0].x;
       y1 = iter2->d.point[0].y;