[debug] Logger - Fix race condition

Race condition if the value reach zero, then the time sample
has to be reset to timeSamplePeriod.

src/debug/logger.cpp

@@ -78,7 +78,10 @@ namespace dynamicgraph
         if(it->second>0.0)
 	  {
 	    it->second -= m_timeSample;
-	    return;
+	    if (it->second<=0.0)
+	      it->second = m_streamPrintPeriod;
+	    else
+	      return;
 	  }
         else  // otherwise reset counter and print
           it->second = m_streamPrintPeriod;

tests/debug-logger-winit.cpp

@@ -7,12 +7,13 @@
  */
 #include <sstream>
 #include <iostream>
+
+#define ENABLE_RT_LOG
 #include <dynamic-graph/entity.h>
 #include <dynamic-graph/exception-factory.h>
 #include "dynamic-graph/factory.h"
 #include "dynamic-graph/pool.h"
 
-#define ENABLE_RT_LOG
 #include <dynamic-graph/real-time-logger.h>
 #include <dynamic-graph/logger.h>