fix: Fix uninitialized value found by Valgrind #405

Job	Run time
Lint / Lint	15s
Settings / settings	4s
Official Docker image / Build	11m 37s
Build and test / Matrix configuration	6s
Test Linux distros / Matrix configuration	9s
Build docs / Build docs	48s
Build and test / linux x64 Debug static	10m 9s
Build and test / linux x64 Debug shared	10m 8s
Build and test / linux x64 Release static	10m 40s
Build and test / linux x64 Release shared	11m 4s
Build and test / osx x64 Debug static	19m 21s
Build and test / osx x64 Debug shared	13m 43s
Build and test / osx x64 Release static	20m 19s
Build and test / osx x64 Release shared	20m 34s
Build and test / win x64 Debug static	14m 31s
Build and test / win x64 Debug shared	14m 43s
Build and test / win x64 Release static	18m 5s
Build and test / win x64 Release shared	17m 49s
Build and test / linux arm64 Debug static	9m 43s
Build and test / linux arm64 Debug shared	9m 18s
Build and test / linux arm64 Release static	9m 41s
Build and test / linux arm64 Release shared	9m 23s
Test Linux distros / Alpine	12m 59s
Test Linux distros / ArchLinux	11m 46s
Test Linux distros / CentOS	11m 22s
Test Linux distros / Debian	10m 43s
Test Linux distros / Fedora	11m 11s
Test Linux distros / OpenSUSE	11m 14s
Test Linux distros / Ubuntu	11m 53s
	5h 13m 18s

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