GL 2D: Also set scissor rect when viewport is changed (the clip rect   from the user is relative to the viewport, the scissor rect isn't,   so the scissor needs to re-set).
GL 2D: Also set scissor rect when viewport is changed (the clip rect
  from the user is relative to the viewport, the scissor rect isn't,
  so the scissor needs to re-set).


git-svn-id: 28d9401aa571d5108e51b194aae6f24ca5964c06@29501 8cc4aa7f-3514-0410-904f-f2cc9021211c

crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS