Send Newsletter property has opposite effect

[ChurchCRMBugReport]

The Newsleter labels utility creates labels for the inverse set of families with the send newsletter property set to true.

Collected Value Title	Data
Page Name	/LettersAndLabels.php
Screen Size	1024x1280
Window Size	864x1280
Page Size	864x1280
Platform Information	Linux IDAE001 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64
PHP Version	7.0.28-0ubuntu0.16.04.1
SQL Version	5.7.22-0ubuntu0.16.04.1
ChurchCRM Version	3.1.0
Reporting Browser	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36
Prerequisite Status	Missing Prerequisites: ["Mod Rewrite"]
Integrity check status	{"status":"success"}
Apache Modules	core,mod_so,mod_watchdog,http_core,mod_log_config,mod_logio,mod_version,mod_unixd,mod_access_compat,mod_alias,mod_auth_basic,mod_authn_core,mod_authn_file,mod_authz_core,mod_authz_host,mod_authz_user,mod_autoindex,mod_deflate,mod_dir,mod_env,mod_filter,mod_mime,prefork,mod_negotiation,mod_php7,mod_rewrite,mod_setenvif,mod_socache_shmcb,mod_ssl,mod_status

[crossan007]

This is me.

Discovered while printing Christmas mailing labels...

[crossan007]

This bug was introduced by

e91c121#diff-08692ac0338067ea92d53cae18c0b289R135