fixed infinite loop + fake NOT_FOUND messages

src/Bot.ts

@@ -95,7 +95,7 @@ class Bot {
                             }
                         }
                     }
-                    else {
+                    else if(m.content.startsWith(this.config.prefix) && !m.author.bot) {
                         this.messages.system.send('NOT_FOUND', { phrase: m.content, user: m.member || undefined }, m.channel);
                     }
                 });