Merge pull request #688 from jeltz/spec-teardown-crash

Prevent teardown of test database from throwing error

Author: larskanis

spec/helpers.rb

@@ -701,8 +701,9 @@ def set_etc_hosts(hostaddr, hostname)
 		$pg_server = PG::TestingHelpers::PostgresServer.new("specs", port: port)
 		$pg_server.create_test_db
 	end
+
 	config.after(:suite) do
-		$pg_server.teardown
+		$pg_server.teardown if $pg_server
 	end
 end