mbed TLS upgraded to 2.6.0

Fork of mbedtls by Mark Radbourne

Revision:
2:bbdeda018a3c
Parent:
0:cdf462088d13
--- a/library/threading.c	Fri Sep 29 18:41:59 2017 +0100
+++ b/library/threading.c	Fri Sep 29 19:50:30 2017 +0100
@@ -32,7 +32,7 @@
 #if defined(MBEDTLS_THREADING_PTHREAD)
 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
 {
-    if( mutex == NULL || mutex->is_valid )
+    if( mutex == NULL )
         return;
 
     mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;