Notification bug fix

See affiliates-manager/source/Pages/AffiliatesRegister.php line 93:

//Notify affiliate of their application
$affsubj  = sprintf(__('Affiliate application for %s', 'affiliates-manager' ), $blogname);

However, $blogname is only defined if admin registration notification is enabled. See line 74:

if(get_option(WPAM_PluginConfig::$SendAdminRegNotification) == 1){
  //Notify admin that affiliate has registered
  $blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
  ...
}

I believe $blogname should be defined outside this condition so it is available for the affiliate application submitted email notification subject.