MADS: Added setup code for difficulty dialog
MADS: Implemented support methods for ScreenDialog base class
CRUISE: Fix a couple of CppCheck warnings in Volume
CRUISE: disable more efficiently some code
CRUISE: Reduce the scope of variables in fillpoly()
DEVTOOLS: Remove duplicate table entry in create_neverhood
DEVTOOLS: Skip adding duplicate items in create_neverhood

Some sub rectangles point to the same message list, these are now saved only once instead of several times.
NEVERHOOD: Update neverhood.dat
FULLPIPE: Initialize class variables. CID 1204256
FULLPIPE: Fix potential null dereference. CID 1148380
FULLPIPE: Remove extra sizeof. CID 1220156
FULLPIPE: Remove extra null check. CID 1220155
FULLPIPE: Add additional sanity check. CID 1220154
FULLPIPE: Add missing break. CID 1216226
FULLPIPE: Fix memory leak and missing results. CID 1216225
FULLPIPE: Fix binary logic. CID 1216221
CRUISE: Disable a bit more efficiently some code in Op_Random() and Op_PlayFx()
CRUISE: Reduce the scope of several variables in processActorWalk()
CRUISE: Fix CppCheck warnings in gfxModule
CRUISE: Reduce the scope of some more variables