This element emits logical particles into the ParticleSystem, with the
starting positions based on those of other logical particles.
*/
-QSGTrailEmitter::QSGTrailEmitter(QSGItem *parent) :
+QSGTrailEmitter::QSGTrailEmitter(QQuickItem *parent) :
QSGParticleEmitter(parent)
, m_particlesPerParticlePerSecond(0)
, m_lastTimeStamp(0)