fix: redo issue_pongo_command, add error msg

src/exploit.c

@@ -67,6 +67,7 @@ const char* stage_to_string(int stage)
         case STAGE_YOLODFU:     return "Booting PongoOS...";
         case STAGE_PONGO:       return "Booting...";
         case STAGE_DONE:        return "Done!";
+        case STAGE_ERROR:       return "Error!";
         default:                return "Waiting...";
     }
 }
@@ -80,6 +81,7 @@ int stage_to_progress(int stage)
         case STAGE_YOLODFU:     return 60;
         case STAGE_PONGO:       return 70;
         case STAGE_DONE:        return 100;
+        case STAGE_ERROR:       return 99;
         default:                return 0;
     }
 }