[libxml2] Don't define WIN32 macro

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 16ae1d8f7150758d48fb296aebd8e4d957aaba2c
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Fri Sep 2 04:33:54 2022 +0200

    Don't define WIN32 macro

 configure.ac         | 1 -
 win32/Makefile.bcb   | 4 ++--
 win32/Makefile.mingw | 2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1c8adcd0..6f4c21f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -580,7 +580,6 @@ CYGWIN_EXTRA_PYTHON_LIBADD=
 WIN32_EXTRA_PYTHON_LIBADD=
 case "$host" in
  *-*-mingw*)
- CPPFLAGS="$CPPFLAGS -DWIN32"
  WIN32_EXTRA_LIBADD="-lws2_32"
  WIN32_EXTRA_LDFLAGS="-no-undefined"
  if test "${PYTHON}" != ""
diff --git a/win32/Makefile.bcb b/win32/Makefile.bcb
index c4b51259..1064b807 100644
--- a/win32/Makefile.bcb
+++ b/win32/Makefile.bcb
@@ -42,7 +42,7 @@ XML_INTDIR_A = int.a.bcb
 UTILS_INTDIR = int.utils.bcb
 
 # The preprocessor and its options.
-CPP = cpp32.exe -P- -DWIN32
+CPP = cpp32.exe -P-
 CPPFLAGS = -I"$(XML_SRCDIR)\include" -DNOLIBTOOL 
 !if "$(WITH_THREADS)" != "no"
 CPPFLAGS = $(CPPFLAGS) -D_REENTRANT -D__MT__
@@ -50,7 +50,7 @@ CPPFLAGS = $(CPPFLAGS) -D_REENTRANT -D__MT__
 
 # The compiler and its options.
 CC = bcc32.exe
-CFLAGS = -q -DWIN32 -D_NO_VCL -D_WINDOWS -D_MBCS -DEILSEQ=2 -DNOLIBTOOL -w-
+CFLAGS = -q -D_NO_VCL -D_WINDOWS -D_MBCS -DEILSEQ=2 -DNOLIBTOOL -w-
 CFLAGS = $(CFLAGS) -I"$(XML_SRCDIR)" -I"$(XML_SRCDIR)\include" -I"$(INCPREFIX)" -I"$(INCLUDE)"
 !if "$(WITH_THREADS)" != "no"
 CFLAGS = $(CFLAGS) -D_REENTRANT -tWM
diff --git a/win32/Makefile.mingw b/win32/Makefile.mingw
index 13f2d96f..81f261bc 100644
--- a/win32/Makefile.mingw
+++ b/win32/Makefile.mingw
@@ -40,7 +40,7 @@ endif
 
 # The compiler and its options.
 CC = gcc.exe
-CFLAGS += -DWIN32 -D_WINDOWS -D_MBCS -DNOLIBTOOL 
+CFLAGS += -D_WINDOWS -D_MBCS -DNOLIBTOOL
 CFLAGS += -I$(XML_SRCDIR) -I$(XML_SRCDIR)/include -I$(INCPREFIX) $(INCLUDE)
 ifneq ($(WITH_THREADS),no)
 CFLAGS += -D_REENTRANT