Merge pull request #1 from homeless2010/patch-1

Update ApiWrapAspect.java

Author: slacrey

api-wrap-boot/src/main/java/com/seelyn/apiwrap/ApiWrapAspect.java

@@ -50,6 +50,9 @@ public void before(JoinPoint joinPoint) {
         WrapHandler wrapHandler = (WrapHandler) WrapBeanFactoryUtils.getBean(clazz);
 
         Object[] args = joinPoint.getArgs();
+        if (args == null || args.length == 0) {
+            throw new InvalidWrapSignatureException("签名有误");
+        }
         for (Object obj : args) {
             if (obj instanceof WrapRequest) {
                 //noinspection unchecked