Avoid warning of double arg initialization if prepare_main did not error

Author: Crivella

easybuild/main.py

@@ -808,6 +808,8 @@ def main_with_hooks(args=None):
         init_session_state, eb_go, cfg_settings = prepare_main(args=args)
     except EasyBuildError as err:
         print_error(err.msg, exit_code=err.exit_code)
+    else:
+        args = None
 
     hooks = load_hooks(eb_go.options.hooks)