Fix cmake -DENABLED_PROFILING=OFF

Author: dr-m

sql/sql_parse.cc

@@ -1,5 +1,5 @@
 /* Copyright (c) 2000, 2017, Oracle and/or its affiliates.
- Copyright (c) 2008, 2018, MariaDB
+ Copyright (c) 2008, 2019, MariaDB
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -3016,8 +3016,10 @@ mysql_execute_command(THD *thd)
  else
  {
  WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
+#ifdef ENABLED_PROFILING
  if (lex->sql_command == SQLCOM_SHOW_PROFILE)
  thd->profiling.discard_current_query();
+#endif
  }
 
  thd->status_var.last_query_cost= 0.0;