Changed emit() to emitParticles() to avoid collision with Qt.

src/osgParticle/ModularEmitter.cpp

@@ -21,7 +21,7 @@ osgParticle::ModularEmitter::ModularEmitter(const ModularEmitter& copy, const os
 {
 }
 
-void osgParticle::ModularEmitter::emit(double dt) 
+void osgParticle::ModularEmitter::emitParticles(double dt)
 {
     ConnectedParticleSystem* cps = dynamic_cast<ConnectedParticleSystem*>(getParticleSystem());