STM32F1 assert in SetSysClock replaced

targets/TARGET_STM/TARGET_STM32F1/TARGET_NUCLEO_F103RB/device/system_clock.c

@@ -35,7 +35,7 @@
   */
 
 #include "stm32f1xx.h"
-#include "mbed_assert.h"
+#include "mbed_error.h"
 
 /*!< Uncomment the following line if you need to relocate your vector Table in
      Internal SRAM. */
@@ -145,8 +145,8 @@ void SetSysClock(void)
             if (SetSysClock_PLL_HSI() == 0)
 #endif
             {
-                while(1) {
-                    MBED_ASSERT(1);
+                {
+                    error("SetSysClock failed\n");
                 }
             }
         }