updated for version 7.4.401
Problem:    Can't build on MS-Windows.
Solution:   Include the new files in all the Makefiles.
diff --git a/src/version.c b/src/version.c
index 57c23b5..33cc85d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    401,
+/**/
     400,
 /**/
     399,