[tor-bugs] #30799 [Core Tor/Tor]: Fix a small memory leak in nt_service_install() in ntmain.c

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#30799: Fix a small memory leak in nt_service_install() in ntmain.c
------------------------------+------------------------------
 Reporter:  xiaoyinl          |          Owner:  (none)
     Type:  defect            |         Status:  new
 Priority:  Low               |      Component:  Core Tor/Tor
  Version:  Tor: unspecified  |       Severity:  Minor
 Keywords:                    |  Actual Points:
Parent ID:                    |         Points:
 Reviewer:                    |        Sponsor:
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 A string buffer `command` is allocated on L559, but it's not freed if
 `service_fns.LookupAccountNameA_fn` returns FALSE. The patch I attached
 adds `tor_free(command);` in this `else if` branch.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30799>
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