Fixed issues with gamescope not properly launching.

ptlinux/runtime.py

@@ -406,6 +406,7 @@ def run_game(
 	check: bool = True,
 	extra_environment: Mapping[str, str] | None = None,
 	output_line_filter: OutputLineFilter | None = None,
+	pass_fds: Sequence[int] = (),
 ) -> CommandOutcome:
 	_require_container_host(selection, runner)
 	if not paths.runtime_view.is_dir() and not runner.dry_run:
@@ -502,6 +503,7 @@ def run_game(
 		check=check,
 		stream_output=True,
 		output_line_filter=output_line_filter,
+		pass_fds=pass_fds,
 	)