Fixup.

coupler/keep_alive_subscriber.h

@@ -264,7 +264,7 @@ void callbackCheckHeartBeat() {
         is_down = (timestamp_delta > HEART_BEAT_TIMEOUT_INTERVAL);
         if (is_down) {
           // count for stats the switch to SAFE mode
-          if (CURRENT_STATE != (unsigned int)STATE_DOWN) {
+          if (CURRENT_STATE != (int)STATE_DOWN) {
             CURRENT_STATE = STATE_DOWN;
             SAFE_MODE_STATE_COUNTER += 1;
             UA_LOG_INFO(UA_Log_Stdout, \
@@ -276,11 +276,11 @@ void callbackCheckHeartBeat() {
         }
         else {
           // all good, we received a keep alive in time
-          if (CURRENT_STATE == (unsigned int)STATE_NO_INITIAL_HEART_BEAT) {
+          if (CURRENT_STATE == (int)STATE_NO_INITIAL_HEART_BEAT) {
             // initial keep alive received, printout
             UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "INITIAL HEART BEAT received: %s", coupler_id_str);
           }
-          else if (CURRENT_STATE == (unsigned int)STATE_DOWN) {
+          else if (CURRENT_STATE == (int)STATE_DOWN) {
             // initial keep alive received, printout
             UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, 
                         "UP (recovered %d times): %s", SAFE_MODE_STATE_COUNTER, coupler_id_str);
@@ -292,7 +292,7 @@ void callbackCheckHeartBeat() {
       }
       else {
         // still no hear beat from this coupler ...
-        if (CURRENT_STATE != (unsigned int)STATE_NO_INITIAL_HEART_BEAT){
+        if (CURRENT_STATE != (int)STATE_NO_INITIAL_HEART_BEAT){
           CURRENT_STATE = STATE_NO_INITIAL_HEART_BEAT;
           UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "NO INITIAL HEART BEAT: %s", coupler_id_str);
         }