Search each txout for payment to a wallet address.

This switches a break to a continue if a txout does not include a
pay-to-pubkey-hash script type.  btcwallet only supports
pay-to-pubkey-hash at the moment, and this fixes an issue where a tx
may have an different type of output, as well as pay-to-pubkey-hash,
which may be ignored by the wallet notification code.

Found by dhill.