updated for version 7.3.809

Problem:    The dosinst.c program has a buffer overflow. (Thomas Gwae)
Solution:   Ignore $VIMRUNTIME if it is too long.

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    809,
 /**/
     808,
 /**/