spawn flag disallowed by vte 0.62

The following warning gets logged each time I open a new terminal window or tab:

xfce4-terminal[263491]: (../vte/src/vtepty.cc:813):void vte_pty_spawn_with_fds_async(VtePty*,
const char*, const char* const*, const char* const*, const int*, int, const int*, int, GSpawnFlags,
GSpawnChildSetupFunc, gpointer, GDestroyNotify, int, GCancellable*, GAsyncReadyCallback, gpointer):
runtime check failed: ((spawn_flags & forbidden_spawn_flags()) == 0)

Seems we just need to stop passing G_SPAWN_CHILD_INHERITS_STDIN to vte_terminal_spawn_async().