updated for version 7.4.401

Problem:    Can't build on MS-Windows.
Solution:   Include the new files in all the Makefiles.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    401,
 /**/
     400,
 /**/