Set the dbtype early in init.php instead of in ddl.php.

This ensures the db type is set correctly for adodb when it goes looking
for a driver. It used to work fine, until we stopped including ddl on
every page.

htdocs/init.php

@@ -90,6 +90,13 @@ try {
     // fails for some reason, so we use output buffering to catch whatever
     // the error is instead.
     ob_start();
+
+    if (is_postgres()) {
+        $CFG->dbtype = 'postgres7';
+    }
+    else if (is_mysql()) {
+        $CFG->dbtype = 'mysql';
+    }
     
     $db = &ADONewConnection($CFG->dbtype);
     if (empty($CFG->dbhost)) {

htdocs/lib/ddl.php

@@ -46,12 +46,6 @@
 global $CFG;
 $CFG->libdir = get_config('libroot');
 $CFG->prefix = (isset($CFG->dbprefix)) ? $CFG->dbprefix : '';
-if (is_postgres()) {
-    $CFG->dbtype = 'postgres7';
-}
-else if (is_mysql()) {
-    $CFG->dbtype = 'mysql';
-}
 // Mahara hacks end