new(engine): raise warning instead of error on invalid macro/list name

Signed-off-by: Gianmatteo Palmieri <mail@gian.im>

userspace/engine/falco_load_result.h

@@ -59,7 +59,9 @@ public:
 		LOAD_DEPRECATED_ITEM,
 		LOAD_WARNING_EXTENSION,
 		LOAD_APPEND_NO_VALUES,
-		LOAD_EXCEPTION_NAME_NOT_UNIQUE
+		LOAD_EXCEPTION_NAME_NOT_UNIQUE,
+		LOAD_INVALID_MACRO_NAME,
+		LOAD_INVALID_LIST_NAME
 	};
 
 	virtual ~load_result() = default;