updated for version 7.3.1223
Problem:    Tests fail on MS-Windows.
Solution:   Avoid depending on OS version. Use DOS commands instead of Unix
            commands. (Taro Muraoka, Ken Takata)
diff --git a/src/version.c b/src/version.c
index 2adb488..9a484dd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1223,
+/**/
     1222,
 /**/
     1221,