vim-patch:7.4.477

Problem:    When using ":%diffput" and the other file is empty an extra empty
	    line remains.
Solution:   Set the buf_empty flag.

https://code.google.com/p/vim/source/detail?r=v7-4-477

src/nvim/diff.c

@@ -2237,7 +2237,7 @@ void ex_diffgetput(exarg_T *eap)
         }
       }
 
-      buf_empty = FALSE;
+      buf_empty = bufempty();
       added = 0;
 
       for (i = 0; i < count; ++i) {