[bsp] replace error_handler() by RT_ASSERT(RT_NULL)

bsp/stm32l072/board/board.c

@@ -68,7 +68,10 @@ static void RCC_Configuration(void)
     OscInit.PLL.PLLDIV = RCC_PLLDIV_2;
     OscInit.PLL.PLLMUL = RCC_PLLMUL_4;
     OscInit.PLL.PLLSource = RCC_PLLSOURCE_HSI;
-    HAL_RCC_OscConfig(&OscInit);
+    if (HAL_RCC_OscConfig(&OscInit) != HAL_OK)
+    {
+        RT_ASSERT(RT_NULL);
+    }
 
     /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
     clocks dividers */
@@ -83,7 +86,7 @@ static void RCC_Configuration(void)
     ClkInit.APB2CLKDivider = RCC_HCLK_DIV1;
     if (HAL_RCC_ClockConfig(&ClkInit, FLASH_LATENCY_1) != HAL_OK)
     {
-        error_handler();
+        RT_ASSERT(RT_NULL);
     }
 }