[RFC] vim-patch:7.4.1704 (#5487)

vim-patch:7.4.1704

Problem:    Using freed memory with "wincmd p". (Dominique Pelle)
Solution:   Also clear "prevwin" in other tab pages.

3dda7db4e1

src/nvim/version.c

@@ -739,7 +739,7 @@ static int included_patches[] = {
   // 1707,
   // 1706 NA
   // 1705 NA
-  // 1704,
+  1704,
   1703,
   // 1702,
   // 1701,