disable sentinel if no threads support
@@ -254,7 +254,9 @@ HL_PRIM vsentinel *HL_NAME(ui_start_sentinel)( double timeout, vclosure *c ) {
s->pause = false;
s->original = GetCurrentThreadId();
s->callback = c->fun;
+# ifdef HL_THREADS
s->thread = hl_thread_start(sentinel_loop,s,false);
+# endif
return s;
}
