patch 8.2.1264: terminal getwinpos() test is a bit flaky

Problem:    Terminal getwinpos() test is a bit flaky.
Solution:   Call getwinpos() a bit later.
diff --git a/src/testdir/test_terminal3.vim b/src/testdir/test_terminal3.vim
index 8405cd1..76e8a10 100644
--- a/src/testdir/test_terminal3.vim
+++ b/src/testdir/test_terminal3.vim
@@ -527,11 +527,9 @@
   wincmd j
   set splitright
 
-  call writefile([
-	\ 'echo getwinpos()',
-	\ ], 'XTest_getwinpos')
-  let buf = RunVimInTerminal('-S XTest_getwinpos', {'cols': 60})
-  call TermWait(buf)
+  let buf = RunVimInTerminal('', {'cols': 60})
+  call TermWait(buf, 100)
+  call term_sendkeys(buf, ":echo getwinpos(500)\<CR>")
 
   " Find the output of getwinpos() in the bottom line.
   let rows = term_getsize(buf)[0]
@@ -557,7 +555,6 @@
   call TermWait(buf)
   call term_sendkeys(buf, ":q\<CR>")
   call StopVimInTerminal(buf)
-  call delete('XTest_getwinpos')
   exe buf . 'bwipe!'
   set splitright&
   only!
diff --git a/src/version.c b/src/version.c
index a269082..9b6f1b4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1264,
+/**/
     1263,
 /**/
     1262,