Fix usage of QMutexLocker
Fix usage of QMutexLocker

Not giving QMutexLocker a name means that it's lifetime is
not guaranteed to be bound to the current scope.

Change-Id: I6e58b0aab814c5e686fac3ff0aa6b671e17db240
Reviewed-by: Aaron Kennedy <087c9f3fe24ea980d31d6a327c000f1b04b5a585@nokia.com>

matthewvogt/qtdeclarative,jfaust/qtdeclarative,corngood/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,crobertd/qtdeclarative,qmlc/qtdeclarative,crobertd/qtdeclarative,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,corngood/qtdeclarative,corngood/qtdeclarative,qmlc/qtdeclarative,corngood/qtdeclarative,mgrunditz/qtdeclarative-2d,jfaust/qtdeclarative,matthewvogt/qtdeclarative,jfaust/qtdeclarative,crobertd/qtdeclarative,jfaust/qtdeclarative,crobertd/qtdeclarative,mgrunditz/qtdeclarative-2d,corngood/qtdeclarative,matthewvogt/qtdeclarative,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,jfaust/qtdeclarative,matthewvogt/qtdeclarative,matthewvogt/qtdeclarative,jfaust/qtdeclarative,qmlc/qtdeclarative,crobertd/qtdeclarative,qmlc/qtdeclarative,qmlc/qtdeclarative,matthewvogt/qtdeclarative,qmlc/qtdeclarative,matthewvogt/qtdeclarative,crobertd/qtdeclarative,corngood/qtdeclarative,matthewvogt/qtdeclarative,corngood/qtdeclarative,mgrunditz/qtdeclarative-2d,crobertd/qtdeclarative,jfaust/qtdeclarative