[vdr] Patching streamdev for 1.3.8

["C.Y.M" <syphir@syphir.sytes.net>]

Hi,

I am a bit confused how this section of the code "client/socket.c" gets patched to compenstate for 
vdr-1.3.18.  For example, here is a snip of the code of socket.c:

---SNIP---

st = time_ms();
        if (!TimedWrite((const char*)pkt, pkt.Length(), TimeoutMs)) {
                esyslog("Streamdev: Lost connection to %s:%d: %s",
                                (const char*)RemoteIp(), RemotePort(), strerror(errno));
                Close();
                return false;
        }

        if (Expected != 0) {
                TimeoutMs -= time_ms() - st;
                return Expect(Expected, NULL, TimeoutMs);
        }

---SNIP---

assuming we change the first line (st = time_ms();) to this:

cTimeMs st;
st.Set();

What would the next changed line translate to?

TimeoutMs -= time_ms() - st;

I am confused about how to fix this line because it appears to be a combination of cTimeMs and 
integer values.