updated for version 7.3.640

Problem:    It's not easy to build Vim on Windows with XPM support.
Solution:   Binary files for 7.3.639. (Sergey Khorev)

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    640,
 /**/
     639,
 /**/