[ros-diffs] [tkreuzer] 32419: some cleanup - move NtGdiFlushUserBatch prototype to ntgdi.h - move pool tags from ntgdihdl.h to win32k/tags.h - move DC struct from ntgdihdl.h to win32k/dc.h - replace GDIEMPTYHDR with BASEOBJECT - use BASEOBJECT in DC and GDIDEVICE structures - rename some NtGdiXxx functions that don't deserve that name and remove some that were defined by a macro, but don't exist on windows (#if 0'ed atm) - remove RetrieveDisplayHDC() prototype (doesn't exist)