Replace SHOULD_PEND macro with a function.

(spotted by Uwe Bonnes).

- some preparations for GL-accelerated Blts
- some small optimizations in the Clear code

- Fixed 4-bit RLE encoding of keyframes.
- Fixed signed/unsigned mismatches.
- Added some missing const's.

- "can" -> "do"
- a novella about a bug
- fix some memory leaks

get quad damage.
checkGLcall must not supply a \n as that is supplied by its
expansion.
Performance fixes to save applying the same states 6 times and to
reduce function calls when accessing front/back buffers.
Make traces more readable by more constants -> english descriptions.

  IDirectMusicPerformanceImpl (as the first inherits from the second)
- implement many Loader, AudioPath and Performance8 stubs - fix the
  class factory
- more debug traces
- for now IDirectMusicLoader8::LoadObjectFromFile always returns not
  supported format
- fix the IDirectMusicPerformance8::Init (many crashes)
- implementation of IDirectMusicPerformance8InitAudio

Fix small bug when keyboard buffer overflows.
Use DI_OK instead of 0 for returned values.

and borders. Make this window a popup window.

Add prototypes for RasDeleteEntry* and RasDeleteSubEntry* in ras.h.

vertex shaders with no function supplied. Also split down draw
primitive along the lines of the d3dcore requirements and put in some
diagnostic aids.

Supporting compiling out 16 bit find dialog support.

subfunctions into winedos. Fix quite a few bugs in the implementation
of these functions.

- fix a typo
- duplicate a bug
- some blathering about code duplication
- change fdi.c indentation to be consistent with cabextract.c

- remove obsolete link

cosmetics).

- print sensible information
- fall back to user backend

IDirectInputDevice2AImpl_QueryInterface.

registry.

- Centre dropdown arrow

Stop using SIGALRM for timers.

- better reminder on how to fix memory leaks

- implemented fake midi & performance channels
- implemented some IDirectMusic*8* functions where IDirectMusic*
  equivalent exists
- IDirectMusic*8 interfaces can now be obtained from IDirectMusic
  interfaces (QueryInterface...)
- channel-related performance functions are kinda implemented now