Sonar fixes

Author: garyrussell

spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessor.java

@@ -352,7 +352,7 @@ private void processMultiMethodListeners(Collection<KafkaListener> classLevelLis
 		Method defaultMethod = null;
 		for (Method method : multiMethods) {
 			Method checked = checkProxy(method, bean);
-			if (AnnotationUtils.findAnnotation(method, KafkaHandler.class).isDefault()) {
+			if (AnnotationUtils.findAnnotation(method, KafkaHandler.class).isDefault()) { // NOSONAR never null
 				final Method toAssert = defaultMethod;
 				Assert.state(toAssert == null, () -> "Only one @KafkaHandler can be marked 'isDefault', found: "
 						+ toAssert.toString() + " and " + method.toString());

spring-kafka/src/main/java/org/springframework/kafka/config/MethodKafkaListenerEndpoint.java

@@ -110,13 +110,12 @@ private String getReplyTopic() {
 		if (method != null) {
 			SendTo ann = AnnotationUtils.getAnnotation(method, SendTo.class);
 			if (ann != null) {
-				if (method.getReturnType().equals(void.class)) {
-					if (this.logger.isWarnEnabled()) {
+				if (method.getReturnType().equals(void.class)
+					&& this.logger.isWarnEnabled()) {
 						this.logger.warn("Method "
 								+ method
 								+ " has a void return type; @SendTo is ignored" +
 								(this.errorHandler == null ? "" : " unless the error handler returns a result"));
-					}
 				}
 				String[] destinations = ann.value();
 				if (destinations.length > 1) {