fix：Compilation error #14

Job	Run time
build (examples/factory)	3m 30s
build (examples/A7682E/test_AT)	3m 12s
build (examples/test_BHI260AP)	3m 18s
build (examples/test_EPD)	3m 15s
build (examples/test_factory)	3m 22s
build (examples/test_GPS)	3m 13s
build (examples/test_keypad)	3m 18s
build (examples/test_lora_recv)	3m 17s
build (examples/test_lora_send)	3m 9s
build (examples/test_LTR_553ALS)	3m 19s
build (examples/test_lvgl)	3m 23s
build (examples/test_sd)	3m 25s
build (examples/test_touchpad)	3m 21s
build (examples/test_wifi)	3m 16s
	46m 18s

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