Check_MK Werk 8575: Fixed segfaults and incorrect Livestatus replies when history file is missing

ID: 8575 Title: Fixed segfaults and incorrect Livestatus replies when history file is missing Component: The Check_MK Micro Core Level: 1 Class: Bug Fix Version: 1.4.0i3 When the history file is missing at cmc startup time, the next "GET log" query will cause a segfault. After the automatic restart, further similar queries will just return an empty reply until the next log rotation, although the core has created a history by then.