tests: drivers: adc_api: use proper printf format

This commit changes the adc_api test to use the proper printf
format specifier when printing the ADC samplings. This ensures
that all values are printed on 16-bit. Without this specifier,
negative values are sign-extended and printed on full integer
size (e.g., 0x8000 -> "0xFFFF8000").

Signed-off-by: Mathieu Choplain <[email protected]>

Author: mathieuchopstm

tests/drivers/adc/adc_api/src/test_adc.c

@@ -104,7 +104,7 @@ static void check_samples(int expected_count)
 	for (i = 0; i < BUFFER_SIZE; i++) {
 		int16_t sample_value = m_sample_buffer[i];
 
-		TC_PRINT("0x%04x ", sample_value);
+		TC_PRINT("0x%04hx ", sample_value);
 		if (i < expected_count) {
 			zassert_not_equal(INVALID_ADC_VALUE, sample_value,
 				"[%u] should be filled", i);