fixed exception condition logic

src/libCom/osi/os/WIN32/osdTime.cpp

@@ -140,16 +140,16 @@ static void osdTimeInit ()
 		parm.HighPart = epicsEpochFT.dwHighDateTime;
 		epicsEpoch = parm.QuadPart;
 
+        osdTimeMutex = mutex;
+        ReleaseMutex (mutex);
+
         unixStyleStatus = osdTimeSych ();
         if (unixStyleStatus!=tsStampOK) {
+            osdTimeMutex = NULL;
             CloseHandle (mutex);
             return;
         }
 
-        osdTimeMutex = mutex;
-        ReleaseMutex (mutex);
-        assert (win32Stat);
-
         //
         // spawn off a thread which periodically resynchronizes the offset
         //