DHT11 / clearWatch error weird behavior

To fix the out-of-memory error, replace these lines (refering to post #3)

this.watch = setWatch(function(t) {
    if(ht.watch){ ht.watch = clearWatch(ht.watch); }

with these lines

var w = setWatch(function(t) {
clearWatch(w);

It would be better to set the watch only once (as well as some other setup tasks), instead of setting it in every run (as it is done in this .js module).