vim-patch:7.4.1892

Problem:    balloon eval only gets the window number, not the ID.
Solution:   Add v:beval_winid.

c9721bdc63

src/nvim/version.c

@@ -550,7 +550,7 @@ static int included_patches[] = {
   1895,
   // 1894 NA
   1893,
-  // 1892 NA
+  1892,
   // 1891 NA
   // 1890 NA
   // 1889,