On MinGW-W64, MsgWaitForMultipleObjects is guarded with #ifndef NOGDI.

Unfortunately, including wingdi.h brings in #define ERROR 0 which
conflicts with several Git internal enums. So, #undef ERROR.

Signed-off-by: Marat Radchenko <ma...@slonopotamus.org>
---
 config.mak.uname  | 4 ++--
 git-compat-util.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/config.mak.uname b/config.mak.uname
index a376b32..4883fd5 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -363,7 +363,7 @@ ifeq ($(uname_S),Windows)
        COMPAT_OBJS = compat/msvc.o compat/winansi.o \
                compat/win32/pthread.o compat/win32/syslog.o \
                compat/win32/dirent.o
-       COMPAT_CFLAGS = -DNOGDI -DHAVE_STRING_H -DHAVE_ALLOCA_H -Icompat 
-Icompat/regex -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
+       COMPAT_CFLAGS = -DHAVE_STRING_H -DHAVE_ALLOCA_H -Icompat -Icompat/regex 
-Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
        BASIC_LDFLAGS = -IGNORE:4217 -IGNORE:4049 -NOLOGO -SUBSYSTEM:CONSOLE 
-NODEFAULTLIB:MSVCRT.lib
        EXTLIBS = user32.lib advapi32.lib shell32.lib wininet.lib ws2_32.lib 
invalidcontinue.obj
        PTHREAD_LIBS =
@@ -503,7 +503,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
        NO_INET_NTOP = YesPlease
        NO_POSIX_GOODIES = UnfortunatelyYes
        DEFAULT_HELP_FORMAT = html
-       COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO=0 -D__USE_MINGW_ACCESS 
-D_USE_32BIT_TIME_T -DNOGDI -Icompat -Icompat/win32
+       COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO=0 -D__USE_MINGW_ACCESS 
-D_USE_32BIT_TIME_T -Icompat -Icompat/win32
        COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
        COMPAT_OBJS += compat/mingw.o compat/winansi.o \
                compat/win32/pthread.o compat/win32/syslog.o \
diff --git a/git-compat-util.h b/git-compat-util.h
index aa57a04..48bf0f7 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -98,6 +98,8 @@
 #define WIN32_LEAN_AND_MEAN  /* stops windows.h including winsock.h */
 #include <winsock2.h>
 #include <windows.h>
+/* wingdi.h defines ERROR=0, undef it to avoid conflicts */
+#undef ERROR
 #define GIT_WINDOWS_NATIVE
 #endif
 
-- 
1.9.1

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