From deed0f473400bc2e91dde8bad2537d499a5941ea Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Tue, 13 Mar 2007 06:09:09 -0400
Subject: [PATCH] [polygon,spline,traps] Avoid free(NULL)

---
 src/cairo-polygon.c | 2 +-
 src/cairo-spline.c  | 2 +-
 src/cairo-traps.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/cairo-polygon.c b/src/cairo-polygon.c
index 6ed0165eb..52c72b710 100644
--- a/src/cairo-polygon.c
+++ b/src/cairo-polygon.c
@@ -56,7 +56,7 @@ _cairo_polygon_init (cairo_polygon_t *polygon)
 void
 _cairo_polygon_fini (cairo_polygon_t *polygon)
 {
-    if (polygon->edges != polygon->edges_embedded)
+    if (polygon->edges && polygon->edges != polygon->edges_embedded)
 	free (polygon->edges);
 
     polygon->edges = NULL;
diff --git a/src/cairo-spline.c b/src/cairo-spline.c
index 3fd0f13ef..3624bfc34 100644
--- a/src/cairo-spline.c
+++ b/src/cairo-spline.c
@@ -90,7 +90,7 @@ _cairo_spline_init (cairo_spline_t *spline,
 void
 _cairo_spline_fini (cairo_spline_t *spline)
 {
-    if (spline->points != spline->points_embedded)
+    if (spline->points && spline->points != spline->points_embedded)
 	free (spline->points);
 
     spline->points = NULL;
diff --git a/src/cairo-traps.c b/src/cairo-traps.c
index 04228c134..b767db844 100644
--- a/src/cairo-traps.c
+++ b/src/cairo-traps.c
@@ -77,7 +77,7 @@ _cairo_traps_init (cairo_traps_t *traps)
 void
 _cairo_traps_fini (cairo_traps_t *traps)
 {
-    if (traps->traps != traps->traps_embedded)
+    if (traps->traps && traps->traps != traps->traps_embedded)
 	free (traps->traps);
 
     traps->traps = NULL;