[clutter-gst/clutter-gst-3.0] player: fix segfault when sink emits a NULL frame

[Lionel Landwerlin <llandwerlin src gnome org>]

commit b4ff502a31bc09dea60f1d02ae2a19eb45924039
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Fri Nov 4 00:54:12 2016 +0000

    player: fix segfault when sink emits a NULL frame
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773810

 clutter-gst/clutter-gst-player.c |   21 +++++++++++----------
 1 files changed, 11 insertions(+), 10 deletions(-)
---
diff --git a/clutter-gst/clutter-gst-player.c b/clutter-gst/clutter-gst-player.c
index 6dc9823..c106ac5 100644
--- a/clutter-gst/clutter-gst-player.c
+++ b/clutter-gst/clutter-gst-player.c
@@ -43,6 +43,8 @@
 #include "config.h"
 #endif
 
+#include <string.h>
+
 #include "clutter-gst-enum-types.h"
 #include "clutter-gst-marshal.h"
 #include "clutter-gst-player.h"
@@ -388,19 +390,18 @@ clutter_gst_player_update_frame (ClutterGstPlayer *player,
                                  ClutterGstFrame  *new_frame)
 {
   ClutterGstFrame *old_frame = *frame;
+  ClutterGstVideoResolution old_res = { 0, }, new_res = { 0, };
 
   *frame = g_boxed_copy (CLUTTER_GST_TYPE_FRAME, new_frame);
 
-  if (old_frame == NULL ||
-      new_frame->resolution.width != old_frame->resolution.width ||
-      new_frame->resolution.height != old_frame->resolution.height ||
-      new_frame->resolution.par_n != old_frame->resolution.par_n ||
-      new_frame->resolution.par_d != old_frame->resolution.par_d)
-    {
-      g_signal_emit (player, signals[SIZE_CHANGE], 0,
-                     new_frame->resolution.width,
-                     new_frame->resolution.height);
-    }
+  if (old_frame)
+    old_res = old_frame->resolution;
+  if (new_frame)
+    new_res = new_frame->resolution;
+
+  if (memcmp(&old_res, &new_res, sizeof(old_res)) != 0)
+    g_signal_emit (player, signals[SIZE_CHANGE], 0,
+                   new_res.width, new_res.height);
 
   if (old_frame)
     g_boxed_free (CLUTTER_GST_TYPE_FRAME, old_frame);