修复bytehelper & VlInt中的已知bug

src/main/java/component/SignatureValue.java

@@ -103,7 +103,12 @@ public class SignatureValue implements TlvComponentBase, IEncodingAble {
             return false;
         }
 
-        int len=block.getLength().getVlIntValue2Int();
+        int len= 0;
+        try {
+            len = block.getLength().getVlIntValue2Int();
+        } catch (VlIntException e) {
+            e.printStackTrace();
+        }
         this.value=new byte[len];
         System.arraycopy(block.getValue(),0,this.value,0,len);
         return true;