use default values

include/utp.h

@@ -154,19 +154,8 @@ extern "C"
   // For utp_writev, to writes data from multiple buffers
   struct utp_iovec
   {
-#ifdef __cplusplus
-    utp_iovec() : iov_base(nullptr), iov_len(0)
-    {
-    }
-
-    utp_iovec(const utp_iovec &other)
-        : iov_base(other.iov_base), iov_len(other.iov_len)
-    {
-    }
-#endif
-
-    void *iov_base;
-    size_t iov_len;
+    void *iov_base = nullptr;
+    size_t iov_len = 0;
   };
 
   // Public Functions