No postgre support, install file improvement.

Greetings,

First of all thanks a lot for smsgateway.module. I have found that there is no PostgreSQL support and MySQL installation is not included into install file. I propose you the following source code to add PostgreSQL support and move MySQL installation (to get rid of smsgateway.mysql script).

function smsgateway_install()
{
  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      $ret1 = db_query('
         CREATE TABLE {smslog} (
         sid int(10) NOT NULL auto_increment,
         direction varchar(3) NOT NULL,
         number varchar(20) NOT NULL,
         message text default NULL,
         response varchar(128) default NULL,
         `timestamp` int(11) unsigned NOT NULL default 0,
         KEY smslog_timestamp (timestamp),
         PRIMARY KEY (sid)) TYPE=MyISAM /*!40100 DEFAULT CHARACTER SET utf8 */;
      ');
      $ret2 = $ret1;
      break;

    case 'pgsql':
      $ret1 = db_query('
        CREATE TABLE {smslog} (
        sid serial NOT NULL,
        direction varchar(3) NOT NULL,
        number varchar(20) NOT NULL,
        message text default NULL,
        response varchar(128) default NULL,
        timestamp integer NOT NULL default 0,
        PRIMARY KEY (sid));
      ');
      $ret2 = db_query('CREATE INDEX smslog_timestamp ON {smslog} (timestamp);');
      break;
  }

  if ($ret1 && $ret2) {
    drupal_set_message(t('SMS Gateway module installed succesfully.'));
  } else {
    drupal_set_message(t('SMS Gateway module installation was unsuccesfull. Necessary database tables should be created by hand.', 'error'));
  }
}

function smsgateway_update_1() {
  return _system_update_utf8( array('smslog'));
}

Please, consider using this code for install file for both CVS version and 4.7 branch.

Thanks a lot.