updated for version 7.3.544
Problem:    There is no good way to close a quickfix window when closing the
            last ordinary window.
Solution:   Add the QuitPre autocommand.
diff --git a/src/fileio.c b/src/fileio.c
index 6fe1127..0781424 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -7678,6 +7678,7 @@
     {"MenuPopup",	EVENT_MENUPOPUP},
     {"QuickFixCmdPost",	EVENT_QUICKFIXCMDPOST},
     {"QuickFixCmdPre",	EVENT_QUICKFIXCMDPRE},
+    {"QuitPre",		EVENT_QUITPRE},
     {"RemoteReply",	EVENT_REMOTEREPLY},
     {"SessionLoadPost",	EVENT_SESSIONLOADPOST},
     {"ShellCmdPost",	EVENT_SHELLCMDPOST},