[PATCH] recreate /tmp/mc-$USER if it is deleted.

[Denis Vlasenko]

Hi mc-devel,

I am running a script which deletes ordinary files and directories in
/tmp if they are older than $THRESHOLD seconds. mc falls victim to it:
if I have mc running for days, /tmp/mc-$USER gets deleted and mc
complains that it cannot create temporary files when I, for example,
try to enter a .tar.gz.

The fix is very non-intrusive and cheap (just an extra lstat). See
attached patch. Run tested.
--
vda
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