Fix bug in threading sample implementation
#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;
