updated for version 7.4.140

Problem:    Crash when wiping out buffer triggers autocommand that wipes out
            only other buffer.
Solution:   Do not delete the last buffer, make it empty. (Hirohito Higashi)

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    140,
 /**/
     139,
 /**/