Fix bug trying to serialize -1 as a long.

Author: calvertdw

src/main/java/us/ihmc/robotDataLogger/logger/ZEDSVOLoggerManager.java

@@ -77,15 +77,15 @@ private void onZEDSDKAnnounceMessage(ZEDSDKAnnounce message)
       if (zedLoggers.containsKey(announceHash))
       {
          ZEDSVOLogger zedSVOLogger = zedLoggers.get(announceHash);
-         if (message.getControllerTimestamp() != -1)
+         if (message.getControllerTimestamp() != 0)
             zedSVOLogger.synchronize(message);
 
          if (zedSVOLogger.isClosed())
          {
             zedLoggers.remove(announceHash);
          }
       }
-      else if (message.getControllerTimestamp() != -1)
+      else if (message.getControllerTimestamp() != 0)
       {
          File perceptionDir = new File(tempDirectory, "perception");
          perceptionDir.mkdirs();