Take sound listener y rotation (roll) into account, though currently unused for actors

apps/openmw/mwworld/worldimp.cpp

@@ -1575,7 +1575,8 @@ namespace MWWorld
         const OEngine::Physic::PhysicActor *actor = mPhysEngine->getCharacter(getPlayerPtr().getRefData().getHandle());
         if(actor) playerPos.z += 1.85*actor->getHalfExtents().z;
         Ogre::Quaternion playerOrient = Ogre::Quaternion(Ogre::Radian(getPlayerPtr().getRefData().getPosition().rot[2]), Ogre::Vector3::NEGATIVE_UNIT_Z) *
-                    Ogre::Quaternion(Ogre::Radian(getPlayerPtr().getRefData().getPosition().rot[0]), Ogre::Vector3::NEGATIVE_UNIT_X);
+                    Ogre::Quaternion(Ogre::Radian(getPlayerPtr().getRefData().getPosition().rot[0]), Ogre::Vector3::NEGATIVE_UNIT_X) *
+                    Ogre::Quaternion(Ogre::Radian(getPlayerPtr().getRefData().getPosition().rot[1]), Ogre::Vector3::NEGATIVE_UNIT_Y);
         MWBase::Environment::get().getSoundManager()->setListenerPosDir(playerPos, playerOrient.yAxis(),
                                                                         playerOrient.zAxis());
     }