Fixed voice_connection.stopPlaying

Now unpipes before destroying

lib/Structures/Server.js

@@ -182,6 +182,7 @@ var Server = (function (_Equality) {
 			this.eventStopSpeaking(user);
 
 			channel.speaking.add(user);
+			user.voiceChannel = channel;
 			return true;
 		} else {
 			// bad
@@ -206,6 +207,7 @@ var Server = (function (_Equality) {
 
 			if (chan.speaking.has(user)) {
 				chan.speaking.remove(user);
+				user.voiceChannel = null;
 				return chan;
 			}
 		}