vim-patch:7.4.462

Problem:    Setting the local value of 'backupcopy' empty gives an error.
	    (Peter Mattern)
Solution:   When using an empty value set the flags to zero. (Hirohito
	    Higashi)

https://code.google.com/p/vim/source/detail?r=v7-4-462

src/nvim/version.c

@@ -283,7 +283,7 @@ static int included_patches[] = {
   //465 NA
   //464 NA
   463,
-  //462,
+  462,
   //461 NA
   //460 NA
   //459 NA