Fix music disc sound leaking across dimensions (#552)

Stop streaming music (jukebox) when the player changes dimensions so music disc sounds from the overworld cannot be heard in the nether or vice versa.

Previously, the streaming audio continued playing at its original world coordinates even after a dimension change, causing the sound to leak into the new dimension at the same position.

Fixes #411

Minecraft.Client/ClientConnection.cpp

@@ -2694,6 +2694,10 @@ void ClientConnection::handleRespawn(shared_ptr<RespawnPacket> packet)
 		int oldDimension = minecraft->localplayers[m_userIndex]->dimension;
 		started = false;
 
+		// Stop any streaming music (e.g. jukebox) when changing dimensions
+		// so it doesn't leak into the new dimension
+		level->playStreamingMusic(L"", 0, 0, 0);
+
 		// Remove client connection from this level
 		level->removeClientConnection(this, false);