fixup: example

Author: rleh

examples/stm32f4_discovery/audio_i2s/main.cpp

@@ -44,7 +44,14 @@ main()
 
 	modm::Cs43l22<cs43::I2cMaster, cs43::I2sMaster> audioDac{cs43::I2CAddress};
 
-	audioDac.setMasterVolume(-600);
+	if (RF_CALL_BLOCKING(audioDac.initialize())) {
+		LedGreen::set();
+	}
+	else {
+		LedRed::set();
+	}
+
+	RF_CALL_BLOCKING(audioDac.setMasterVolume(-600));
 
 	constexpr std::size_t bufferSize = 480;
 	auto bufferA = computeSinTable<uint16_t, bufferSize>(1);
@@ -54,7 +61,6 @@ main()
 	cs43::I2sMaster::start();
 
 	LedOrange::set();
-	LedRed::set();
 
 	uint8_t counter{3};