updated for version 7.4.165

Problem:    By default, after closing a buffer changes can't be undone.
Solution:   In the example vimrc file set 'undofile'.

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    165,
 /**/
     164,
 /**/