System Environment:
--------------------------

--Platform: 945G


--2D driver:
commit 548d4c0f979a72eac5d0c9c76da12f0bd05e64e1 

--3D driver:
commit 990e010394a2685c1daeaef61cf4f7e2a0ba419e

--Xserver:
commit cf20df39cc78203d17b99223908af388ecbf7d0e 

--Drm
commit b44f2da380e78769b58c751e81f376f0fa1f48aa 

--Kernel:
2.6.23.1


Bug detailed description:
-------------------------
render a 16x16 video to surface, then try put that surface to window and scaling it up by 8x8 times. But it turns out it's not working well, there's black border on the right and bottom sides.
and it's working with scaling less times, such as 7x7 times.


Reproduce steps:
----------------
1. enable XvMC in xorg.conf
2. start X
3. compile and run attached case



Current result:
----------------
there's black border on the right and bottom sides


Expected result:
----------------
should render correctly