wined3d: Add support for updating part of a compressed surface. (try2)

[Christof Sigel]

Made some last minute changes to two variable names to keep in line with 
the style of device.c. Apparently I forgot to do a test compile and thus 
missed changing them where they were used, that has now been fixed.
IWineD3DDeviceImpl_UpdateSurface now handles compressed surfaces when
source and destination are different sizes.
This fixes bug 10406.
---
  dlls/wined3d/device.c |  184 
++++++++++++++++++++++++++++++++++---------------
  1 files changed, 128 insertions(+), 56 deletions(-)


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