add handle error: SignatureType

src/main/java/component/SignatureType.java

@@ -141,7 +141,12 @@ public class SignatureType implements TlvComponentBase, IEncodingAble {
         }
 
         // 尝试从 TLE-VALUE 中读取出一个非负整数
-        long result= TLV.readNonNegativeInteger(block.getValue(),0,block.getLength().getVlIntValue2Int());
+        long result= 0;
+        try {
+            result = TLV.readNonNegativeInteger(block.getValue(),0,block.getLength().getVlIntValue2Int());
+        } catch (VlIntException e) {
+            throw new Error("SignatureType.wireDecode: Invalid SignatureType TLV");
+        }
         if(result<0){
             return false;
         }