Fixed water splash that tended to appear at race start

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@7399 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/karts/kart.cpp

@@ -1467,6 +1467,7 @@ void Kart::loadData()
     
     m_water_splash_system = new ParticleEmitter(ParticleKindManager::get()->getParticles("splash.xml"),
                                                 core::vector3df(0.0f, 0.0f, 0.0f), getNode());
+    m_water_splash_system->setCreationRate(0);
     
     core::vector3df position(0, getKartHeight()*0.35f, -getKartLength()*0.35f);