Gwenhywfar

buffer: Simplified by removing GWEN_BUFFER_MODE_USE_SYNCIO

Moved GWEN_SimplePtr to use new test framework.

- fixed a newly found bug in SimplePtr code

Use new test framework with GWEN_IDLIST64.

Started implementing a module test framework.

Changed position of "#define GWEN_TREE2_H".

Added function GWEN_StringList_RemoveFirstString().

Merge branch 'mp-202001-refactoring_idlist64'

simpleptrlist: Decreased verbosity.

idlist64: Make API more compatible to previous versions.

Especially make GWEN_IdList64_new() parameterless, because that is
needed when using idlist64 in typemaker2.

Decreased verbosity.

idlist64: Added GWEN_IdList64_dup()

Also added some tests for idlist64 code.

Updated TODO.

idlist64: Refactored idlist64 so that it now uses GWEN_SimplePtrList.

GWEN_SimplePtrList has already been tested by gwen and aqdatabase, so
it is quite stable and safe.

- some tests in aqdatabase revealed problems in the old implementation of
GWEN_IdList64, fixing them would mean to duplicate code, since GWEN_IdList64...

Added to TODO.

SimplePtrList: Increased verbosity of GWEN_SimplePtrList_GetPtrAt().

IdList64: Fixed a bug (found by testing a module in AqDatabase).

SimplePtrList: Export function GWEN_SimplePtrList_EnsureWritability().

SimplePtrList: Fixed a bug in memory management, simplified code.

Base: Fixed a bug in GWEN_SimplePtrList_free()

base: Added function GWEN_SimplePtrList_Clear().

base: Added function GWEN_SimplePtrList_Set/GetUserIntData().

base: Added support for GWEN_INHERIT to GWEN_SIMPLEPTRLIST

base: Fixed a bug in GWEN_SimplePtrList(), added another test.

base: Improved GWEN_SIMPLEPTRLIST

- can now attach to/detach from objects whose pointers are stored
- fixed a newly introduced bug (tests are really great!)

base: Free objects in tests for GWEN_SimplePtrList.

crypt3: fixed a compiler warning.