vim-patch:7.4.1912

Problem:    No test for using setqflist() on an older quickfix list.
Solution:   Add a couple of tests.

1cee693b31

src/nvim/version.c

@@ -528,7 +528,7 @@ static int included_patches[] = {
   // 1915 NA
   // 1914,
   1913,
-  // 1912,
+  1912,
   // 1911,
   // 1910,
   1909,