Fix various Discord-related things.

source/modules/mod_audio.rb

@@ -7,7 +7,7 @@ require 'streamio-ffmpeg'
 # @!visibility private
 class QueueItem
    attr_accessor :next, :prev
-   attr_reader :time, :ptime, :size, :fname, :descr, :is_stream
+   attr_reader :time, :ptime, :size, :fname, :url, :descr, :is_stream
 
    def initialize uri, stream = false
       @is_stream = stream
@@ -19,7 +19,7 @@ class QueueItem
          @fname = uri.to_s
       end
 
-      @descr = uri.to_s
+      @url = uri.to_s
 
       unless @is_stream
          if (mov = FFMPEG::Movie.new(@fname)) and mov.valid?
@@ -29,6 +29,8 @@ class QueueItem
          else
             throw ArgumentError, "File is invalid or is a stream."
          end
+      else
+         @descr = @url
       end
    end
 

source/modules/mod_discord.rb

@@ -15,7 +15,6 @@ class Mod_Discord < Vrobot4::Module::Module
    end
 
    def c_purge m, argv
-      check_args argv, "N"
       n = argv.to_i
       n = 2   if n < 2
       n = 100 if n > 100