prevent NPE when WebAppException#getResponse returns null

Signed-off-by: jansupol <jan.supol@oracle.com>

core-server/src/main/java/org/glassfish/jersey/server/ServerRuntime.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2022 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2024 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -526,7 +526,7 @@ private Response mapException(final Throwable originalThrowable) throws Throwabl
                         processingContext.routingContext().setMappedThrowable(throwable);
 
                         waeResponse = webApplicationException.getResponse();
-                        if (waeResponse.hasEntity()) {
+                        if (waeResponse != null && waeResponse.hasEntity()) {
                             LOGGER.log(Level.FINE, LocalizationMessages
                                     .EXCEPTION_MAPPING_WAE_ENTITY(waeResponse.getStatus()), throwable);
                             return waeResponse;