vim-patch:7.4.171

Problem:    Redo does not set v:count and v:count1.
Solution:   Use a separate buffer for redo, so that we can set the counts when
            performing redo.

https://code.google.com/p/vim/source/detail?r=beb037a6c2708f539d50840637f70eed0811d93c

src/version.c

@@ -203,7 +203,7 @@ static char *(features[]) = {
 static int included_patches[] = {
   // Add new patch number below this line
   172,
-  //171,
+  171,
   170,
   169,
   //168,