patch 8.2.2467: script generated by :mkview changes alternate file

Problem:    Script generated by :mkview changes alternate file.
Solution:   Only write :balt in the session file. (Harish Rajagopal,
            closes #7779)

Author: brammool

src/session.c

@@ -402,7 +402,8 @@ put_view(
 	buf_T *alt = buflist_findnr(wp->w_alt_fnum);
 
 	// Set the alternate file.
-	if (alt != NULL
+	if ((flagp == &ssop_flags)
+		&& alt != NULL
 		&& alt->b_fname != NULL
 		&& *alt->b_fname != NUL
 		&& (fputs("balt ", fd) < 0

src/testdir/test_mksession.vim

@@ -530,6 +530,20 @@ func Test_mkview_open_folds()
   %bwipe
 endfunc
 
+func Test_mkview_no_balt()
+  edit Xtestfile1
+  edit Xtestfile2
+
+  mkview! Xtestview
+  bdelete Xtestfile1
+
+  source Xtestview
+  call assert_equal(0, buflisted('Xtestfile1'))
+
+  call delete('Xtestview')
+  %bwipe
+endfunc
+
 " Test :mkview with a file argument.
 func Test_mkview_file()
   " Create a view with line number and a fold.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2467,
 /**/
     2466,
 /**/