Bug 1523458 - Update libvorbis to 1.3.6. r=jya

Differential Revision: https://phabricator.services.mozilla.com/D17894

--HG--
extra : moz-landing-system : lando

media/libvorbis/COPYING

@@ -1,4 +1,4 @@
-Copyright (c) 2002-2015 Xiph.org Foundation
+Copyright (c) 2002-2018 Xiph.org Foundation
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions

media/libvorbis/README.md

@@ -145,5 +145,5 @@ USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS
 GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE
 IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.
 
-THE OggVorbis SOURCE CODE IS COPYRIGHT (C) 1994-2015
+THE OggVorbis SOURCE CODE IS COPYRIGHT (C) 1994-2018
 by the Xiph.Org Foundation https://www.xiph.org/

media/libvorbis/lib/vorbis_info.c

@@ -30,8 +30,8 @@
 #include "misc.h"
 #include "os.h"
 
-#define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.5"
-#define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20150105 (⛄⛄⛄⛄)"
+#define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.6"
+#define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20180316 (Now 100% fewer shells)"
 
 /* helpers */
 static void _v_writestring(oggpack_buffer *o,const char *s, int bytes){
@@ -588,7 +588,8 @@ int vorbis_analysis_headerout(vorbis_dsp_state *v,
   oggpack_buffer opb;
   private_state *b=v->backend_state;
 
-  if(!b||vi->channels<=0){
+  if(!b||vi->channels<=0||vi->channels>256){
+    b = NULL;
     ret=OV_EFAULT;
     goto err_out;
   }