imm32: When updating a NULL HIMCC with NULL just return NULL. Handle the NULL HIMCC for the compstr when doing a ImmNotifyIME for a reset.

wined3d: SFLAG_INTEXTURE is the same as SFLAG_INDRAWABLE for offscreen render targets when ORM_FBO is used.

wined3d: Move binding the texture and dirtifying the sampler to its own function from surface_download_data().

System processes are now killed only after the server persistence
delay has expired. New processes are not allowed to start during
shutdown.

Use a ME_Context for style selection/unselection.
Store the (x,y) dpi information for a given DC in the corresponding ME_Context structure.

richedit: Don't recreate the DC all the time, but use uniformely a ME_Context structure where needed.

Made the function static as well.