D20440: Fix warning "variable loses precision int to uint8"

[Tomaz Canabrava]

tcanabrava added reviewers: hindenburg, Konsole.

REPOSITORY
  R319 Konsole

REVISION DETAIL
  https://phabricator.kde.org/D20440

To: tcanabrava, hindenburg, #konsole
Cc: konsole-devel, gennad, thsurrel, ngraham, maximilianocuria, hindenburg
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