patch 8.2.1654: when job writes to hidden buffer current window is wrong

Problem:    When job writes to hidden buffer current window has display
            errors.  (Johnny McArthur)
Solution:   Use aucmd_prepbuf() instead of switch_to_win_for_buf().
            (closes #6925)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1654,
 /**/
     1653,
 /**/