some functions calls unnecessary init_result() before calling process() function because in process() function it is called.

In 2.2.11 followings are
src/libs/zbxsysinfo/sysinfo.c : test_parameter()
src/libs/zbxmedia/jabber.c : lookup_jabber()
src/zabbix_server/discoverer/discoverer.c : discover_service
src/zabbix_agent/zabbix_agent.c : main()
src/zabbix_agent/listener.c : process_listener()
src/zabbix_agent/active.c : refresh_active_checks()
src/zabbix_agent/active.c : process_active_checks()
src/zabbix_agent/zabbix_agentd.c : set_defaults()
src/zabbix_proxy/proxy.c : zbx_set_defaults()