vim-patch:7.4.373

Problem:    Compiler warning for unused argument and unused variable.
Solution:   Add UNUSED.  Move variable inside #ifdef.

https://code.google.com/p/vim/source/detail?r=v7-4-373

src/nvim/version.c

@@ -222,7 +222,7 @@ static int included_patches[] = {
   376,
   //375,
   //374,
-  //373 NA
+  373,
   372,
   371,
   370,