pocsag: Tolerate less codeword errors before dropping sync
pocsag: Tolerate less codeword errors before dropping sync

The signal is either good, or it's not. This helps reduces the noise
at the end of a batch.

Signed-off-by: Sylvain Munaut <349f318521b45672c77207abf1a5ed60eb011db1@246tNt.com>

smunaut/osmo-pocsag