fix(dict): 修复枚举遍历时空指针异常问题，添加空值校验

Author: zhou-hao

hsweb-core/src/main/java/org/hswebframework/web/dict/EnumDict.java

@@ -213,6 +213,9 @@ static <T extends EnumDict<?>> long toMask(T... t) {
         }
         long value = 0L;
         for (T t1 : t) {
+            if(t1 == null){
+                continue;
+            }
             value |= t1.getMask();
         }
         return value;