From: Gerhard Sittig <gerhard.sittig@gmx.net>
Date: Tue, 18 Sep 2018 16:34:42 +0000 (+0200)
Subject: Logging: avoid "cb was NULL" warning message during logging shutdown
X-Git-Url: http://git.code-monkey.de/?a=commitdiff_plain;h=e431acda693abc3d0cd339f95a95220c02ae13bd;hp=e431acda693abc3d0cd339f95a95220c02ae13bd;p=pulseview.git

Logging: avoid "cb was NULL" warning message during logging shutdown

Commit 4b9234088f56 introduced the fetch and restore of the libraries'
default log routines in addition to the registration of a Pulseview
application's log routine. Some code paths in main() could result in
unexpected "cb was NULL" messages on stderr, when logging::init() did
not execute but the destructor tried to restore a handler which was not
fetched before. Silence the error message.
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