D25996: KRemoteEncoding::encoding: don't return temporary. Found with clazy.

[Christian Ehrlicher]

chehrlic added reviewers: thiago, dfaure.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D25996

To: chehrlic, thiago, dfaure
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns
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