Fix commands not working in some DMs

isBot is sometimes null and causes an exception. Now assume it's false
in those cases. Seems to be the proper way, though not sure why it
mostly worked without this - from my own tests Discord always skips the
bot field unless it's true.

Aliucord/src/main/java/com/aliucord/coreplugins/slashcommandsfix/Patches.java

@@ -93,7 +93,8 @@ public void loadPatches(Context context) throws Throwable {
                     var channelType = channel.D();
                     if (channelType == Channel.DM) {
                         var user = channel.z().get(0);
-                        var userIsBot = user.e();
+                        var userIsBot = Optional.ofNullable(user.e())
+                            .orElse(false);
                         if (userIsBot) {
                             var channelId = channel.k();
                             applicationIndexSource = Optional.of(new ApplicationIndexSourceDm(channelId));