Hi,

I found an instance in lib/ftp.c where the returned pointer from
strdup() is not being properly checked. It is presently blindly being
passed as a parameter to infof(), which would likely fault if strdup()
were to return a NULL pointer.

I am not sure what the best failure mode is for this particular case,
in terms of recovering from the error at the FTP level, but the
attached patch fixes the crash.

Cheers,

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