D21788: Make Plasma::Svg::elementRect a bit leaner

[Aleix Pol Gonzalez]

apol marked an inline comment as done.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D21788

To: apol, #plasma, #frameworks
Cc: bruns, kde-frameworks-devel, LeGast00n, michaelh, ngraham