Fix no-argument !join command.

src/main/java/moe/nekojimi/chords/commands/JoinCommand.java

@@ -26,16 +26,28 @@ public class JoinCommand extends Command
         VoiceChannel channel = null;
         if (args.isEmpty() || args.get(0).isBlank())
         {
-            GuildVoiceState voiceState = event.getMember().getVoiceState();
-            if (voiceState != null && voiceState.inVoiceChannel())
-                channel = voiceState.getChannel();
-            else
+            final Member member = event.getMessage().getMember();
+            if (member != null)
+            {
+                GuildVoiceState voiceState = member.getVoiceState();
+                if (voiceState != null && voiceState.inVoiceChannel())
+                    channel = voiceState.getChannel();
+            }
+            if (channel == null)
             {
                 Guild guild = event.getMessage().getGuild();
                 List<VoiceChannel> voiceChannels = guild.getVoiceChannels();
-                Optional<VoiceChannel> findFirst = voiceChannels.stream().filter((t) -> !t.getMembers().isEmpty()).findFirst();
-                channel = findFirst.orElseThrow(() -> new RuntimeException("Cannot find any voice channels with people in!"));
+                System.out.println("Finding channel to join...");
+                for (VoiceChannel voiceChannel : voiceChannels)
+                {
+                    List<Member> members = voiceChannel.getMembers();
+                    if (!members.isEmpty())
+                        channel = voiceChannel;
+                    System.out.println("\t" + voiceChannel.getName() + " " + members.size());
+                }
             }
+            if (channel == null)
+                throw new RuntimeException("Cannot find any voice channels with people in!");
         } else
         {
             String arg0 = args.get(0);