Add test

Author: owen-mc

java/ql/test/query-tests/security/CWE-532/Test.java

@@ -19,4 +19,10 @@ void test3(String username) {
  logger.error("Auth failed for: " + username); // Safe
  }
 
+ void test4(String nullToken) {
+ Logger logger = null;
+
+ logger.error("Auth failed for: " + nullToken); // Safe
+ }
+
 }