[fpc-devel] Some RTL bug fixes and suggestions

[NetSpirit]

Anyone, who responsible to make fixes in code, please, check if my next
suggestions can be applied.

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In file 'rtl\win\wininc\struct.inc' need declare NMHDR.code field as
Integer (as in Delphi), not UINT.
I know, Windows SDK declare this as UINT, but constants, used in this
field, are often declared as signed, e.g:

NM_CLICK = -(2);
NM_DBLCLK = -(3);
NM_KILLFOCUS = -(8);
NM_OUTOFMEMORY = -(1);

This require explicit cast in every code (e. g. if Integer(NMHDR.code) =
NM_CLICK then ...).
In Delphi NMHDR.code declared as Integer.

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packages\pasjpeg

Error usage after compile in -Mdelphiunicode mode.
In file 'packages\pasjpeg\src\jpeglib.pas' member
jpeg_error_mgr.format_message still uses AnsiString which is wrong.
Because at the end of file 'packages\pasjpeg\src\jconfig.inc' exists
switch {$MODE DELPHI}
Possible solution: {$ifndef UNICODE}{$MODE DELPHI}{$endif}

=============

File 'packages\winunits-base\src\wininet.pp' - error compile in
-Mdelphiunicode mode (with -dFPC_OS_UNICODE cmd line switch).

There is errors in declarations of overloaded functions
- FindFirstUrlCacheEntry
- FindNextUrlCacheEntry