Werk #2542: Fix segmentation fault when filtering for service columns in log table

Component	Livestatus
Title	Fix segmentation fault when filtering for service columns in log table
Date	Sep 2, 2015
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The crash occurred when you filtered for a text type service column in the log table while entries did not have service information (host alerts).

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