Merge topic 'semi-warnings'

4b548c1028 Source: Fix -Wmissing-variable-declarations warning
29ffa5f48c Source: fix -Wextra-semi-stmt warnings

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !6758