patch 8.2.1542: Vim9: test with invalid SID does not work in the GUI

Problem:    Vim9: test with invalid SID does not work in the GUI.
Solution:   Skip the test in the GUI.

Author: brammool

src/testdir/test_vim9_script.vim

@@ -3261,6 +3261,9 @@ def Test_cmdline_win()
 enddef
 
 def Test_invalid_sid()
+  # TODO: why does this not work in the GUI?
+  CheckNotGui
+
   assert_fails('func <SNR>1234_func', 'E123:')
   if RunVim([], ['wq Xdidit'], '+"func <SNR>1_func"')
     call assert_equal([], readfile('Xdidit'))

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1542,
 /**/
     1541,
 /**/