[TRÅDFRI] Dimming not possible any more

[Kroki0815]

Since last changes is it not possible to send procentual values to the dimm-item of a bulb.
ON/OFF is working. Sending a value has no effect.

Version: 2.5.0-SNAPSHOT Build #1545

Expected Behavior

Sending values beetween 0% and 100% dimms the bulb.

Current Behavior

Sending values beetween 0% and 100% has no effect on the bulb.

2019-03-03 12:20:30.661 [ome.event.ItemCommandEvent] - Item 'iDIMM_SCHREIBTISCH' received command 50 2019-03-03 12:20:30.663 [nt.ItemStatePredictedEvent] - iDIMM_SCHREIBTISCH predicted to become 50 2019-03-03 12:20:30.663 [vent.ItemStateChangedEvent] - iDIMM_SCHREIBTISCH changed from 0 to 50 2019-03-03 12:20:30.667 [vent.ItemStateChangedEvent] - iDIMM_SCHREIBTISCH changed from 50 to 0

Debug:
2019-03-03 12:20:30.661 [DEBUG] [internal.handler.TradfriThingHandler] - Sending payload: {"3311":[{"5851":127.0,"5712":5}],"3":{}} 2019-03-03 12:20:30.662 [DEBUG] [g.tradfri.internal.TradfriCoapClient] - CoAP PUT request uri: coaps://192.168.50.84:5684/15001/65538 payload: {"3311":[{"5851":127.0,"5712":5}],"3":{}} 2019-03-03 12:20:30.664 [DEBUG] [.tradfri.internal.TradfriCoapHandler] - CoAP response options: {} payload: 2019-03-03 12:20:30.666 [DEBUG] [.tradfri.internal.TradfriCoapHandler] - CoAP response options: {"Observe":85, "Content-Format":"application/json", "Max-Age":604800} payload: {"9002":1522496553,"9001":"Schreibtisch","9020":1551610251,"9003":65538,"9054":0,"5750":2,"3":{"0":"IKEA of Sweden","1":"TRADFRI bulb E14 WS opal 400lm","2":"","3":"1.2.221","6":1},"9019":1,"3311":[{"5851":254,"5850":0,"5717":0,"5711":454,"5709":33137,"5706":"efd275","5710":27211,"9003":0}]} 2019-03-03 12:20:30.666 [DEBUG] [internal.handler.TradfriLightHandler] - Setting state to OFF

I do not know exactly since which version this behavior occurs. But for me, the last version i use without problerms ( not only with tradfri ) is Build #1502.

[cweitkamp]

My fault. In https://github.com/openhab/openhab2-addons/pull/4895 I changed rounding from Math.round() to Math.floor(). First method returns an int, second one a double. We have to add an int cast before creating the payload. I will submit a fix for it.