q{,Utf8}Printable: avoid creating a copy of a QString

We have this QString() constructor call to permit things that convert to
QString but aren't QString to be used in qPrintable, like a
QStringBuilder-powered fast operator+ expression, like:

    qPrintable(string1 + ": " + string2)

Unfortunately, it meant that we unnecessarily created a QString copy if
the input was already QString.

Change-Id: Iecab8770aa5840aba8edfffd1516bc94cec791a9
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions