#684138 by carlos8f and Heine: Fixed bug in SQLite's NextId() that prevented installation.

includes/database/sqlite/database.inc

@@ -186,7 +186,7 @@ public function nextId($existing_id = 0) {
     }
     // The transaction gets committed when the transaction object gets destroyed
     // because it gets out of scope.
-    return $new_value;
+    return (int) $this->query('SELECT value FROM {sequences}')->fetchField();
   }
 }