E_ALL compliance: fix notices

If you use this module with a 6.x-dev version of Drupal that has E_ALL error reporting turned on, you get:

node/add

    notice: Use of undefined constant gids - assumed 'gids' in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 819.
    notice: Undefined index: gids in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 819.
    notice: Undefined variable: allowed_types in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 838.
    notice: Undefined index: in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 839.
    notice: Undefined variable: gid in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 872.
    notice: Undefined variable: gid in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 872.
    notice: Undefined index: gids in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 783.
    notice: Undefined index: gids in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 783.

/admin

notice: Constant NOT_ASSIGNED_TO_GROUP already defined in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.install on line 11.
notice: Constant ASSIGNED_TO_GROUP already defined in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.install on line 12.
notice: Constant DEACTIVATED already defined in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.install on line 17.
notice: Constant ACTIVATED already defined in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.install on line 18.
notice: Constant REQUIRED already defined in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.install on line 19.

admin/content/types

    notice: Undefined variable: new_allowed in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 1248.
    notice: Undefined variable: new_active in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 1248.

admin/og/og_content_types

    notice: Undefined variable: form in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 203.
    notice: Use of undefined constant colspan - assumed 'colspan' in /Users/webchick/Sites/og/sites/all/modules/og_content_type_admin/og_content_type_admin.module on line 273.