8253960: Memory leak in Java_java_lang_ClassLoader_defineClass0()

Reviewed-by: mchung, stuefe, alanb

src/java.base/share/native/libjava/ClassLoader.c

@@ -260,7 +260,7 @@ Java_java_lang_ClassLoader_defineClass0(JNIEnv *env,
         utfName = NULL;
     }
 
-    return JVM_LookupDefineClass(env, lookup, utfName, body, length, pd, initialize, flags, classData);
+    result = JVM_LookupDefineClass(env, lookup, utfName, body, length, pd, initialize, flags, classData);
 
  free_body:
     free(body);