MSVC: Don't #include <unistd.h>.

lib/getopt.c

@@ -29,7 +29,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifndef _MSC_VER
 # include <unistd.h>
+#endif
 
 #ifdef __VMS
 # include <unixlib.h>

lib/getopt.in.h

@@ -34,7 +34,9 @@
 #if defined __GETOPT_PREFIX && !defined __need_getopt
 # include <stdlib.h>
 # include <stdio.h>
+# ifndef _MSC_VER
 #  include <unistd.h>
+# endif
 # undef __need_getopt
 # undef getopt
 # undef getopt_long

src/xz/private.h

@@ -21,7 +21,10 @@
 #include <signal.h>
 #include <locale.h>
 #include <stdio.h>
+
+#ifndef _MSC_VER
 #	include <unistd.h>
+#endif
 
 #include "tuklib_gettext.h"
 #include "tuklib_progname.h"

src/xzdec/xzdec.c

@@ -16,7 +16,10 @@
 #include <stdarg.h>
 #include <errno.h>
 #include <stdio.h>
+
+#ifndef _MSC_VER
 #	include <unistd.h>
+#endif
 
 #include "getopt.h"
 #include "tuklib_progname.h"