AVALANCHE: Fix another bug regarding speaking.

This prevents the player from giving commands to Avalot when the
character is tied up to a tree, so it's impossible to break the game's
consistency that way.
AVALANCHE: Move Clock to dedicated files.
VOYEUR: Implemented remaining initialisations in sInitPic
FULLPIPE: Initial code for scene35
FULLPIPE: Plug scene35 in
AUDIO: Register MT-32 emulator as plain sound type.

Formerly the audio stream was registered as sfx. This is incorrect behavior
since the client code will control music volume with MIDI events on its own.
It seems 67b311713d8f4cfcd460a9649e0075f24278a048 introduced this very long
ago.

This should fix unintended coupling of sfx volume and music volume in BASS.
AUDIO: Register FluidSynth driver as plain sound type.

MIDI code will control volume via MIDI events thus the generated audio should
not be affected by mixer sound volumes.

The initial commit(s) in d4d045b1174b4a48659f39f026ade42684b679bf /
13dc149ded691e718905049990dd0220230c500e added it as music sound type.
So, this seems to be a long standing issue.
AUDIO: Register EAS sound driver as plain sound type.

MIDI code will control volume via MIDI events thus the generated audio should
not be affected by mixer sound volumes.

The initial commit 0e6cdfd67580f75e912c5e92abb26821d032f74b added it as music
sound type. Might be copied from the (also) incorrect FluidSynth code.
FULLPIPE: Implement sceneHandler35()
FULLPIPE: Implement sceneHandler35_stopFlow() and _shrink()
FULLPIPE: Implement sceneHandler35_startFlow()
AUDIO: Cleanup MT-32 code a bit.

This removes overwrites in ReportHandlerScummVM which are simply the default
implementation anyway. A side effect is that this silences/fixes a warning
about the former onProgramChanged to hide an virtual method due to parameter
differences.
KYRA: Slight cleanup.
TONY: Cleanup (don't compare pointer with false).
VOYEUR: Fix selection of apartment music after initial phone call ends
CGE: Further alignment fixes to Bitmap class.

This fixes bug #6476 - "DC: Soltys (CGE) crashes at start up".
MORTEVIELLE: Remove unused structure and an obsolete comment
FULLPIPE: Implement sceneHandler35_genFlies()
FULLPIPE: Renames in scene35. This completes the scene
FULLPIPE: Enable scene35