patch 8.1.0092: prompt buffer test fails

Problem:    Prompt buffer test fails.
Solution:   Set 'nomodified' before closing the window. (Ozaki Kiichi,
            closes #3051
diff --git a/src/testdir/test_prompt_buffer.vim b/src/testdir/test_prompt_buffer.vim
index a6269de..1b8a1ec 100644
--- a/src/testdir/test_prompt_buffer.vim
+++ b/src/testdir/test_prompt_buffer.vim
@@ -24,6 +24,8 @@
   call writefile([
 	\ 'func TextEntered(text)',
 	\ '  if a:text == "exit"',
+	\ '    " Reset &modified to allow the buffer to be closed.',
+	\ '    set nomodified',
 	\ '    stopinsert',
 	\ '    close',
 	\ '  else',
diff --git a/src/version.c b/src/version.c
index 3fcdb73..80a3c2c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    92,
+/**/
     91,
 /**/
     90,