Fix exitcode

store_config deletes error-related keys

wither.py

@@ -302,14 +302,17 @@ def run() -> int:
 	assert_config(config)
 	config_new = purge(config)
 	printdbg(f"Concluded with {config_new.error_count} non-fatal errors and fatal_error={config_new.fatal_error}")
-	store_config(config_new)
 
 	if config_new.fatal_error:
-		return 1
+		ec = 1
 	elif config_new.error_count > 0:
-		return 2
+		ec = 2
 	else:
-		return 0
+		ec = 0
+
+	store_config(config_new)
+	return ec
+
 
 if __name__ == "__main__":
 	sys.exit(run())