Use the path to the database instead of the db object. Fixes #5

lib/logstash/inputs/sqlite.rb

@@ -157,7 +157,7 @@ def run(queue)
           rows = get_n_rows_from_table(@db, table_name, offset, @batch)
           count += rows.count
           rows.each do |row| 
-            event = LogStash::Event.new("host" => @host, "db" => @db)
+            event = LogStash::Event.new("host" => @host, "db" => @path)
             decorate(event)
             # store each column as a field in the event.
             row.each do |column, element|