Fix compiler warnings for unused variable
@@ -119,7 +119,9 @@ uint16_t old_pos;
#endif /* USART_USE_DMA */
static uint8_t initialized;
+#if USART_USE_DMA
static uint8_t is_running;
+#endif /* USART_USE_DMA */
#if ESP_INPUT_USE_PROCESS
void usart_ll_thread(void const * arg);
