Merge commit 'd4d90504'

* commit 'd4d90504':
  tls_gnutls: Add missing includes for the gcrypt thread safety callbacks
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/tls_gnutls.c

@@ -37,6 +37,7 @@
 
 #if HAVE_THREADS && GNUTLS_VERSION_NUMBER <= 0x020b00
 #include <gcrypt.h>
+#include "libavutil/thread.h"
 GCRY_THREAD_OPTION_PTHREAD_IMPL;
 #endif