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/dosinst.c

@@ -375,7 +375,7 @@ get_vim_env(void)
 
     /* First get $VIMRUNTIME.  If it's set, remove the tail. */
     vim = getenv("VIMRUNTIME");
-    if (vim != NULL && *vim != 0)
+    if (vim != NULL && *vim != 0 && strlen(vim) < BUFSIZE)
     {
 	strcpy(buf, vim);
 	remove_tail(buf);

src/version.c

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