g10: fix uninit use

* g10/encrypt.c (reencrypt_to_new_recipients): Drop first
  (and uninitialized) use of 'count'.

In reencrypt_to_new_recipients, count isn't used in the first loop
and we later initialise it before another loop (where it is used), so
drop the first bogus use, as the increment was working w/ an uninit var
otherwise.

Found by GCC's -fanalyzer.

• Signed-off-by: Sam James <sam@gentoo.org>