Compile error on 0.1.29 #5

bstone/udpsocket.v:81:63: error: unexpected `sizeof`, expecting `name`
   79 |     // level, optname, optvalue
   80 |     bufsize := Default_Buffer_Size
   81 |     C.setsockopt(sock, C.SOL_SOCKET, C.SO_RCVBUF, &bufsize, C.sizeof(bufsize))
      |                                                               ~~~~~~
   82 | 
   83 |     zero := 0

$ ../v/v --version
V 0.1.29 ca7a64a