Fix RulesApplicator::InputsSourceFlag
Fix RulesApplicator::InputsSourceFlag

This enum is used for a QFlags type, so we cannot have a zero value in
there.

Change-Id: Ifd935c398065b0706cb0fba85c1752c448c26f4c
Reviewed-by: Alexandru Croitor <8ffcaf561685ad82d027def0dc95a2702daba6ec@qt.io>

qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qt-labs/qbs