Win32 dirent: remove unused dirent.d_ino member

There are no proper inodes on Windows, so remove dirent.d_ino and #define
NO_D_INO_IN_DIRENT in the Makefile (this skips e.g. an ineffective qsort in
fsck.c).

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Stepan Kasal <kasal@ucw.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

compat/win32/dirent.h

@@ -9,7 +9,6 @@ typedef struct DIR DIR;
 #define DT_LNK     3
 
 struct dirent {
-	long d_ino;                      /* Always zero. */
 	char d_name[FILENAME_MAX];       /* File name. */
 	union {
 		unsigned short d_reclen; /* Always zero. */

config.mak.uname

@@ -349,6 +349,7 @@ ifeq ($(uname_S),Windows)
 	NO_POSIX_GOODIES = UnfortunatelyYes
 	NATIVE_CRLF = YesPlease
 	DEFAULT_HELP_FORMAT = html
+	NO_D_INO_IN_DIRENT = YesPlease
 
 	CC = compat/vcbuild/scripts/clink.pl
 	AR = compat/vcbuild/scripts/lib.pl
@@ -497,6 +498,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	NO_INET_NTOP = YesPlease
 	NO_POSIX_GOODIES = UnfortunatelyYes
 	DEFAULT_HELP_FORMAT = html
+	NO_D_INO_IN_DIRENT = YesPlease
 	COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -D_USE_32BIT_TIME_T -DNOGDI -Icompat -Icompat/win32
 	COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
 	COMPAT_OBJS += compat/mingw.o compat/winansi.o \