Werk #15473: ec: Fix crash in parsing syslog

Component	Event Console
Title	ec: Fix crash in parsing syslog
Date	May 5, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b7 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p34 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously, parsing of syslog would crash if pid wasn't a number, e.g. "App[-]: message". This can happend if syslog messages are forwarded or processed from some other instance.

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