patch 8.2.2737: status line not updated when local 'statusline' option set

Problem:    Status line not updated when local 'statusline' option set.
Solution:   Check the 'statusline' option of each window.

src/ex_getln.c

@@ -1710,10 +1710,19 @@ getcmdline_int(
 #ifdef FEAT_STL_OPT
     // Redraw the statusline in case it uses the current mode using the mode()
     // function.
-    if (!cmd_silent && msg_scrolled == 0 && *p_stl != NUL)
+    if (!cmd_silent && msg_scrolled == 0)
     {
-	curwin->w_redr_status = TRUE;
-	redraw_statuslines();
+	int	found_one = FALSE;
+	win_T	*wp;
+
+	FOR_ALL_WINDOWS(wp)
+	    if (*p_stl != NUL || *wp->w_p_stl != NUL)
+	    {
+		wp->w_redr_status = TRUE;
+		found_one = TRUE;
+	    }
+	if (found_one)
+	    redraw_statuslines();
     }
 #endif
 

src/testdir/dumps/Test_statusline_mode_1.dump

@@ -1,5 +1,7 @@
 > +0&#ffffff0@49
 |~+0#4040ff13&| @48
-|~| @48
-|-+3#0000000&|n|-| @46
+|++3#0000000&|n|+| @46
+| +0&&@49
+|~+0#4040ff13&| @48
+|-+1#0000000&|n|-| @46
 | +0&&@49

src/testdir/dumps/Test_statusline_mode_2.dump

@@ -1,5 +1,7 @@
 | +0&#ffffff0@49
 |~+0#4040ff13&| @48
-|~| @48
-|-+3#0000000&|c|-| @46
+|++3#0000000&|c|+| @46
+| +0&&@49
+|~+0#4040ff13&| @48
+|-+1#0000000&|c|-| @46
 |:+0&&> @48

src/testdir/test_statusline.vim

@@ -452,19 +452,20 @@ func Test_statusline_using_mode()
   CheckScreendump
 
   let lines =<< trim END
-    set laststatus=2
-    let &statusline = '-%{mode()}-'
+    setlocal statusline=-%{mode()}-
+    split
+    setlocal statusline=+%{mode()}+
   END
   call writefile(lines, 'XTest_statusline')
 
-  let buf = RunVimInTerminal('-S XTest_statusline', {'rows': 5, 'cols': 50})
+  let buf = RunVimInTerminal('-S XTest_statusline', {'rows': 7, 'cols': 50})
   call VerifyScreenDump(buf, 'Test_statusline_mode_1', {})
 
   call term_sendkeys(buf, ":")
   call VerifyScreenDump(buf, 'Test_statusline_mode_2', {})
 
   " clean up
-  call term_sendkeys(buf, "\<CR>")
+  call term_sendkeys(buf, "close\<CR>")
   call StopVimInTerminal(buf)
   call delete('XTest_statusline')
 endfunc

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2737,
 /**/
     2736,
 /**/