[dia] [scan-build] Dereference of null pointer (maybe)

[Hans Breuer <hans src gnome org>]

commit 1a9c1780e638bf00b31460d2b7282ec11964570c
Author: Hans Breuer <hans breuer org>
Date:   Fri Sep 5 13:14:14 2014 +0200

    [scan-build] Dereference of null pointer (maybe)
    
    Access to field 'len' results in a dereference of a null pointer
    (loaded from field 'pathes')
    File: /home/hb/from-git/dia/lib/diapathrenderer.c
    Line: 870

 lib/diapathrenderer.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/lib/diapathrenderer.c b/lib/diapathrenderer.c
index 28ec030..9367586 100644
--- a/lib/diapathrenderer.c
+++ b/lib/diapathrenderer.c
@@ -865,6 +865,8 @@ create_standard_path_from_list (GList           *objects,
 
     _path_renderer_clear (pr);
     obj->ops->draw (obj, renderer);
+    if (!pr->pathes) /* nothing created? */
+      continue;
     /* get a single path from this rendererer run */
     p2 = g_array_new (FALSE, FALSE, sizeof(BezPoint));
     for (i = 0; i < pr->pathes->len; ++i) {