* In unaligned.h, remove some unnecessary casts and mark the arg of the

  get_unaligned functions as const
* In event.c, use get_unaligned_uint32() in a couple of places to fix issues on
  architectures that don't allow unaligned access


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@92305 65c4cc65-6c06-0410-ace0-fbb531ad65f3