Memory leak, missing a few bytes

Hello Gordon,

Received the Espruino. What i nice device! But i think i've found a mem leak.
Using 1v55.

The simple code:

// Callback function for din change

var cl=function(e) {  
    if (e.state===true) {
        print("Test...\n");
    }
};
var wid=setWatch(cl,B12,{repeat: false, debounce: 20});

After uploading process.memory(); shows 1766 free.

Each buttonpress decreases the free mem by aprox. 2 bytes.

Regards

Sacha