matching the preprocessor conditionals for xTaskGetCurrentTaskHandle() (#197)

diff --git a/portable/Common/mpu_wrappers.c b/portable/Common/mpu_wrappers.c
index 60469fc..f8d10d7 100644
--- a/portable/Common/mpu_wrappers.c
+++ b/portable/Common/mpu_wrappers.c
@@ -513,7 +513,7 @@
 #endif

 /*-----------------------------------------------------------*/

 

-#if ( INCLUDE_xTaskGetCurrentTaskHandle == 1 )

+#if ( ( INCLUDE_xTaskGetCurrentTaskHandle == 1 ) || ( configUSE_MUTEXES == 1 ))

     TaskHandle_t MPU_xTaskGetCurrentTaskHandle( void ) /* FREERTOS_SYSTEM_CALL */

     {

         TaskHandle_t xReturn;