and pgsql, also make the $pwg_db_link global in the install_db_connect function
so that it can be used in SQLite functions.
bug fixed: with pdo-sqlite, pwg_db_num_rows always returns 0, so when
initializing user data, it tries to insert the same row twice.
git-svn-id: http://piwigo.org/svn/trunk@6090 68402e56-0260-453c-a942-63ccdbb3a9ee