Remove cast and change type of clock.

ecal/core/include/ecal/pubsub/types.h

@@ -67,7 +67,7 @@ namespace eCAL
     const void* buffer = nullptr;       //!< payload buffer, containing the sent data
     size_t      buffer_size = 0;        //!< payload buffer size
     int64_t     send_timestamp = 0;     //!< publisher send timestamp in µs
-    uint64_t    send_clock = 0;         //!< publisher send clock. Each publisher increases the counter by one, every time a message is sent. It can be used to detect message drops.
+    int64_t     send_clock = 0;         //!< publisher send clock. Each publisher increases the counter by one, every time a message is sent. It can be used to detect message drops.
   };
 
   /**

ecal/core/src/pubsub/ecal_subscriber_impl.cpp

@@ -534,7 +534,7 @@ namespace eCAL
         // prepare data struct
         SReceiveCallbackData cb_data;
         cb_data.buffer   = static_cast<const void*>(payload_);
-        cb_data.buffer_size  = long(size_);
+        cb_data.buffer_size  = size_;
         cb_data.send_timestamp  = time_;
         cb_data.send_clock = clock_;