Radio :r and :l fixes and feature.

If you have a hand held radio in your right hand and use :r it will send through it.
If you have a radio on both ears and no radio in your hand and use :r it will use the right side ear radio.

Priority is given to the radio in the hand over the ear but this fix should make both side happy, those that want it to be ears and those tht want it to be hand helds.

:r and :l weren't working before because I screwed up the proc call.  It was sending verb where it was supposed to be sending the message_channel, so added a null in that spot.