Fix for a error being thrown when there is no error

src/me/libraryaddict/disguise/commands/DisguiseRadiusCommand.java

@@ -56,7 +56,7 @@ public class DisguiseRadiusCommand extends BaseDisguiseCommand {
         } catch (Exception ex) {
             if (ex.getMessage() != null && !ChatColor.getLastColors(ex.getMessage()).equals("")) {
                 sender.sendMessage(ex.getMessage());
-            } else {
+            } else if (ex.getCause() != null) {
                 ex.printStackTrace();
             }
             return true;