Entity spawn packets use integers for yaw and pitch instead of bytes

Entity spawn packets use integers for yaw and pitch values unlike all other packets which use bytes to store yaw and pitch of entities. During the serialization they are converted to byte, but this serialization does not happen on singleplayer when receiving packets from integrated servers. This leads to singleplayer clients displaying entities (that aren't mobs) (e.g. boats) rotated slightly different from multiplayer clients.