vim-patch:8.0.0134 (#7109)

Problem:    Null pointer access reported by UBsan.
Solution:   Check curwin->w_buffer is not NULL. (Yegappan Lakshmanan)

c4bfedabe0

src/nvim/ex_cmds.c have been merged by someone. while version.c remain unmerged.

src/nvim/version.c

@@ -595,7 +595,7 @@ static const int included_patches[] = {
   // 137,
   136,
   135,
-  // 134,
+  134,
   133,
   // 132,
   // 131,