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.

src/fileio.c

@@ -7678,6 +7678,7 @@ static struct event_name
     {"MenuPopup",	EVENT_MENUPOPUP},
     {"QuickFixCmdPost",	EVENT_QUICKFIXCMDPOST},
     {"QuickFixCmdPre",	EVENT_QUICKFIXCMDPRE},
+    {"QuitPre",		EVENT_QUITPRE},
     {"RemoteReply",	EVENT_REMOTEREPLY},
     {"SessionLoadPost",	EVENT_SESSIONLOADPOST},
     {"ShellCmdPost",	EVENT_SHELLCMDPOST},