patch 8.2.0333: terminal in popup test is flaky

Problem:    Terminal in popup test is flaky.
Solution:   Make sure redraw is done before opening the popup.

src/testdir/dumps/Test_terminal_popup_1.dump

@@ -12,4 +12,4 @@
 |1@1| @11|╚+0#0000001#ffd7ff255|═@44|⇲| +0#0000000#ffffff0@13
 |1|2| @72
 |1|3| @72
-|t|e|r|m|i|n|a|l| |p|o|p|u|p| @42|0|,|0|-|1| @8|A|l@1| 
+|t|e|r|m|i|n|a|l| |p|o|p|u|p| @42|1|,|1| @10|T|o|p| 

src/testdir/test_terminal.vim

@@ -2339,29 +2339,28 @@ func Test_terminal_in_popup()
 	\ 'hi PopTerm ctermbg=grey',
 	\ 'func OpenTerm(setColor)',
 	\ "  let s:buf = term_start('" .. cmd .. " Xtext', #{hidden: 1, term_finish: 'close'})",
-	\ '  let s:winid = popup_create(s:buf, #{minwidth: 45, minheight: 7, border: [], drag: 1, resize: 1})',
+	\ '  let g:winid = popup_create(s:buf, #{minwidth: 45, minheight: 7, border: [], drag: 1, resize: 1})',
 	\ '  if a:setColor',
-	\ '    call win_execute(s:winid, "set wincolor=PopTerm")',
+	\ '    call win_execute(g:winid, "set wincolor=PopTerm")',
 	\ '  endif',
 	\ 'endfunc',
-	\ 'call OpenTerm(0)',
 	\ 'func HidePopup()',
-	\ '  call popup_hide(s:winid)',
+	\ '  call popup_hide(g:winid)',
 	\ 'endfunc',
 	\ 'func ClosePopup()',
-	\ '  call popup_close(s:winid)',
+	\ '  call popup_close(g:winid)',
 	\ 'endfunc',
 	\ 'func ReopenPopup()',
 	\ '  call popup_create(s:buf, #{minwidth: 40, minheight: 6, border: []})',
 	\ 'endfunc',
-	\ 'sleep 10m',
-	\ 'redraw',
-	\ 'echo getwinvar(s:winid, "&buftype") win_gettype(s:winid)',
 	\ ]
   call writefile(lines, 'XtermPopup')
   let buf = RunVimInTerminal('-S XtermPopup', #{rows: 15})
   call term_wait(buf, 100)
+  call term_sendkeys(buf, ":call OpenTerm(0)\<CR>")
+  call term_wait(buf, 100)
   call term_sendkeys(buf, ":\<CR>")
+  call term_sendkeys(buf, "\<C-W>:echo getwinvar(g:winid, \"&buftype\") win_gettype(g:winid)\<CR>")
   call VerifyScreenDump(buf, 'Test_terminal_popup_1', {})
 
   call term_sendkeys(buf, ":q\<CR>")

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    333,
 /**/
     332,
 /**/