patch 9.0.1252: MS-Windows: scrollback cropped off on Vim exit

Problem:    MS-Windows: scrollback cropped off on Vim exit.
Solution:   Don't call SetConsoleScreenBufferInfoEx when using the alternate
            screen buffer. (Christopher Plewright, closes #11882)
diff --git a/src/version.c b/src/version.c
index 64da4b3..89017e0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1252,
+/**/
     1251,
 /**/
     1250,