fix doxygen comment

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12370 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_limit/mod_limit.c

@@ -289,7 +289,7 @@ static switch_status_t do_config()
 
 	sql = switch_mprintf("delete from limit_data where hostname='%q';", globals.hostname);
 	limit_execute_sql(sql, globals.mutex);
-	switch_safe_free(sql);
+	switch_core_db_free(sql);
 
 	switch_xml_free(xml);